Job 197f2f3a-a183-46cb-a38c-35dab4d99ad6
Details and log output for this agent run.
Agent
greg
greg
Log
Thinking
Let's start by exploring the project to understand the codebase and find where the container names are being generated.
Tool 🔧 list_files {"path":".","recursive":false}
Arguments
{"path":".","recursive":false}
Result
drwxr-xr-x 5 user user 4096 Aug 27 08:48 . drwxr-xr-x 1 root root 4096 Aug 27 08:48 .. drwxr-xr-x 7 user user 4096 Aug 27 08:48 .git -rw-r--r-- 1 user user 22 Aug 27 08:48 .gitignore -rw-r--r-- 1 user user 343 Aug 27 08:48 Makefile -rw-r--r-- 1 user user 6589 Aug 27 08:48 README.md drwxr-xr-x 2 user user 4096 Aug 27 08:48 docker -rw-r--r-- 1 user user 2628 Aug 27 08:48 go.mod -rw-r--r-- 1 user user 16578 Aug 27 08:48 go.sum drwxr-xr-x 11 user user 4096 Aug 27 08:48 internal -rw-r--r-- 1 user user 4812 Aug 27 08:48 main.go -rw-r--r-- 1 user user 3092 Aug 27 08:48 zoo.hcl.example
Tool 🔧 bash {"command":"cd /project && git log --oneline -5 && git status"}
Arguments
{"command":"cd /project && git log --oneline -5 && git status"}
Result
5ebce58 Merge pull request 'Allow agents to merge approved pull requests' (#77) from issue-76-greg into main 1da1d20 Allow agents to merge approved pull requests f33fed4 Merge pull request 'Move main.go from cmd/zoo/ to root directory' (#75) from issue-74-mika into main ec2fe2d Move main.go from cmd/zoo/ to root directory a00979b Add makefile. On branch issue-78-greg nothing to commit, working tree clean
Thinking
Let's explore the internal directory and find where the container name is generated.
Tool 🔧 grep_search {"query":"issue-%d-|issue-.*agent|containerName|ContainerName|container name"}
Arguments
{"query":"issue-%d-|issue-.*agent|containerName|ContainerName|container name"}
Result
/project/internal/agentrun/forgejo.go:21:// failed, so every comment, PR, label, or issue-state change an agent
/project/internal/agentrun/run.go:149: branch := fmt.Sprintf("issue-%d-%s", ev.Index, agent.Name)
/project/internal/agentrun/run.go:204: }, fmt.Sprintf("zoo-issue-%d-%s", ev.Index, agent.Name))
Thinking
Let's look at the run.go file and understand how container names are generated.
Tool 🔧 read_file {"end_line":260,"path":"internal/agentrun/run.go","start_line":100}
Arguments
{"end_line":260,"path":"internal/agentrun/run.go","start_line":100}
Result
{"path":"internal/agentrun/run.go","content":"\t\tc = r.forgejo\n\t}\n\n\tr.agentClients[agentName] = c\n\n\treturn c\n}\n\n// Run implements scheduler.Runner.\nfunc (r *Runner) Run(ctx context.Context, jobID string, agent config.AgentConfig, llmCfg config.LLM, dockerImage string, ev forgejo.Event) error {\n\tctx, cancel := context.WithTimeout(ctx, r.timeout)\n\tdefer cancel()\n\n\tlogger := r.logger.With(\"job\", jobID, \"agent\", agent.Name)\n\n\trepoInfo, err := r.forgejo.RepositoryInfo(ev.Owner, ev.Repo)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"look up repository: %w\", err)\n\t}\n\n\tworkDir, err := os.MkdirTemp(\"\", \"zoo-run-*\")\n\tif err != nil {\n\t\treturn fmt.Errorf(\"create work dir: %w\", err)\n\t}\n\n\tsucceeded := false\n\n\tdefer func() {\n\t\tif succeeded || !r.keepOnFailure {\n\t\t\tos.RemoveAll(workDir)\n\t\t} else {\n\t\t\tlogger.Warn(\"keeping work dir after failure\", \"dir\", workDir)\n\t\t}\n\t}()\n\n\t// The container bind-mounts projectDir as /project and does the\n\t// initial clone into it, so the (empty) directory must exist on the\n\t// host before the container is created — otherwise Docker would\n\t// create it itself, root-owned.\n\tprojectDir := filepath.Join(workDir, \"project\")\n\n\tif err := os.MkdirAll(projectDir, 0o755); err != nil {\n\t\treturn fmt.Errorf(\"create project dir: %w\", err)\n\t}\n\n\t// A pr:review run works on the PR's own head branch, so the agent's\n\t// commits push straight to the PR. Every other event kind branches\n\t// off the default branch as usual.\n\tvar review *forgejo.ReviewDetail\n\tbranch := fmt.Sprintf(\"issue-%d-%s\", ev.Index, agent.Name)\n\n\tif ev.Kind == forgejo.EventPRReview {\n\t\t// Always fetch the current head ref, not just when the event\n\t\t// lacks one (the polling path doesn't carry it): the webhook's\n\t\t// copy could be stale if the PR's head branch was renamed since\n\t\t// the review, and the push target depends on it.\n\t\theadRef := ev.HeadRef\n\n\t\tif prInfo, err := r.forgejo.PullRequestInfo(ev.Owner, ev.Repo, ev.Index); err != nil {\n\t\t\tlogger.Warn(\"fetch pull request head failed; falling back to the event's head ref\", \"error\", err)\n\t\t} else if prInfo.HeadRef != \"\" {\n\t\t\theadRef = prInfo.HeadRef\n\t\t}\n\n\t\tif headRef == \"\" {\n\t\t\treturn fmt.Errorf(\"pr:review event has no pull request head branch to check out\")\n\t\t}\n\n\t\tbranch = headRef\n\n\t\t// Fetch the full review (verdict, body, inline comments) so the\n\t\t// agent sees all the feedback, not just the triggering event. A\n\t\t// failure degrades to no review detail rather than failing the\n\t\t// run: the agent can still do its job, just without the inline\n\t\t// comments.\n\t\treview, err = r.forgejo.ReviewDetail(ev.Owner, ev.Repo, ev.Index, ev.ReviewID)\n\t\tif err != nil {\n\t\t\tlogger.Warn(\"fetch review detail failed; agent will not see inline review comments\", \"error\", err)\n\t\t\treview = nil\n\t\t}\n\t}\n\n\troster := buildRoster(r.forgejo, r.cfg.Agents, logger)\n\tgitName, gitEmail := gitIdentity(agent.Name, roster)\n\n\t// The credential the sandbox's git uses for remote operations: the\n\t// agent's own Forgejo token when configured, so its git activity is\n\t// attributed to its own account, falling back to the shared zoo\n\t// identity for deployments without per-agent tokens (mirroring\n\t// forgejoAs).\n\tgitUser, gitToken := \"zoo\", r.forgejo.Token()\n\n\tif agent.Token != \"\" {\n\t\tgitUser, gitToken = agent.Name, agent.Token\n\t}\n\n\teventPath := filepath.Join(workDir, \"event.json\")\n\tif err := os.WriteFile(eventPath, ev.Raw, 0o644); err != nil {\n\t\treturn fmt.Errorf(\"write event file: %w\", err)\n\t}\n\n\tcontainerID, err := r.docker.createContainer(ctx, dockerImage, []string{\n\t\tprojectDir + \":/project\",\n\t\teventPath + \":/event:ro\",\n\t}, fmt.Sprintf(\"zoo-issue-%d-%s\", ev.Index, agent.Name))\n\tif err != nil {\n\t\treturn fmt.Errorf(\"start container: %w\", err)\n\t}\n\n\tdefer func() {\n\t\tcleanupCtx, cleanupCancel := context.WithTimeout(context.Background(), 30*time.Second)\n\t\tdefer cleanupCancel()\n\t\tif err := r.docker.remove(cleanupCtx, containerID); err != nil {\n\t\t\tlogger.Warn(\"failed to remove container\", \"container\", containerID, \"error\", err)\n\t\t}\n\t}()\n\n\t// Git must simply work inside the sandbox: safe.directory, commit\n\t// identity, and the remote credential all go into the container's\n\t// system gitconfig (see configureSandboxGit).\n\tif err := configureSandboxGit(ctx, r.docker, containerID, repoInfo.CloneURL, gitUser, gitToken, gitName, gitEmail); err != nil {\n\t\treturn fmt.Errorf(\"configure git in container: %w\", err)\n\t}\n\n\t// The initial clone happens inside the sandbox, so the working tree\n\t// is owned by the container's user and git never runs on the host.\n\tif ev.Kind == forgejo.EventPRReview {\n\t\tif err := clonePRHead(ctx, r.docker, containerID, repoInfo.CloneURL, repoInfo.DefaultBranch, branch, ev.Index); err != nil {\n\t\t\treturn fmt.Errorf(\"prepare git working tree: %w\", err)\n\t\t}\n\t} else {\n\t\tif err := cloneAndBranch(ctx, r.docker, containerID, repoInfo.CloneURL, repoInfo.DefaultBranch, branch); err != nil {\n\t\t\treturn fmt.Errorf(\"prepare git working tree: %w\", err)\n\t\t}\n\t}\n\n\tlogAppend := func(stream, line string) {\n\t\tif err := r.store.AppendLog(context.Background(), jobID, stream, line); err != nil {\n\t\t\tlogger.Warn(\"failed to append log\", \"error\", err)\n\t\t}\n\t}\n\n\trunCtx := \u0026runContext{\n\t\tdocker: r.docker,\n\t\tcontainerID: containerID,\n\t\tforgejo: \u0026runForgejoActions{\n\t\t\tclient: r.forgejoAs(agent.Name, agent.Token),\n\t\t\towner: ev.Owner,\n\t\t\trepo: ev.Repo,\n\t\t\tindex: ev.Index,\n\t\t\tlogger: logger,\n\t\t},\n\t}\n\n\tllmClient := llm.NewClient(llmCfg)\n\n\tsystemPrompt := defaultSystemPrompt + identitySection(agent.Name, roster)\n\n\tinstructions := r.cfg.EventInstructions(ev.Kind)\n\n\t// Fetch the full comment thread so the agent sees everything that's","start_line":100,"end_line":260,"total_lines":503,"truncated":true}
Thinking
Now I understand the problem. The container name is `zoo-issue-%d-%s` (issue number + agent name). If two runs for the same issue and the same agent happen concurrently (e.g., an issue:assigned event and a comment event on the same issue, or a re-run), the container names will collide.
Let me look at the docker package to understand `createContainer` and how the name is used.
Tool 🔧 list_files {"path":"internal","recursive":true}
Arguments
{"path":"internal","recursive":true}
Result
/project/internal/agentrun /project/internal/agentrun/context.go /project/internal/agentrun/docker.go /project/internal/agentrun/docker_integration_test.go /project/internal/agentrun/forgejo.go /project/internal/agentrun/loop.go /project/internal/agentrun/loop_test.go /project/internal/agentrun/roster.go /project/internal/agentrun/roster_test.go /project/internal/agentrun/run.go /project/internal/agentrun/run_test.go /project/internal/agentrun/sandboxgit.go /project/internal/agentrun/sandboxgit_test.go /project/internal/agentrun/seed_test.go /project/internal/agentrun/system.md /project/internal/config /project/internal/config/config.go /project/internal/config/config_test.go /project/internal/forgejo /project/internal/forgejo/client.go /project/internal/forgejo/client_test.go /project/internal/forgejo/event.go /project/internal/forgejo/poll.go /project/internal/forgejo/poll_test.go /project/internal/forgejo/repo_filter.go /project/internal/forgejo/repo_filter_test.go /project/internal/forgejo/watcher.go /project/internal/forgejo/watcher_test.go /project/internal/forgejo/webhook.go /project/internal/forgejo/webhook_test.go /project/internal/livelog /project/internal/livelog/hub.go /project/internal/livelog/hub_test.go /project/internal/llm /project/internal/llm/arguments.go /project/internal/llm/arguments_test.go /project/internal/llm/client.go /project/internal/llm/error.go /project/internal/llm/error_test.go /project/internal/llm/streamer.go /project/internal/llm/streamer_test.go /project/internal/llm/types.go /project/internal/scheduler /project/internal/scheduler/scheduler.go /project/internal/scheduler/scheduler_test.go /project/internal/store /project/internal/store/schema.sql /project/internal/store/store.go /project/internal/store/store_test.go /project/internal/tools /project/internal/tools/bash.go /project/internal/tools/context.go /project/internal/tools/edit-file.go /project/internal/tools/forgejo.go /project/internal/tools/grep_search.go /project/internal/tools/list_files.go /project/internal/tools/move_file.go /project/internal/tools/read_file.go /project/internal/tools/registry.go /project/internal/tools/remove_file.go /project/internal/tools/shell.go /project/internal/tools/tools_test.go /project/internal/tools/write_file.go /project/internal/web /project/internal/web/templates.go /project/internal/web/web.go /project/internal/web/web_test.go
Thinking
Let's take a look at the docker.go file to understand how the container name is used.
Tool 🔧 read_file {"end_line":120,"path":"internal/agentrun/docker.go","start_line":1}
Arguments
{"end_line":120,"path":"internal/agentrun/docker.go","start_line":1}
Result
{"path":"internal/agentrun/docker.go","content":"package agentrun\n\nimport (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"\n\n\t\"github.com/docker/docker/api/types/container\"\n\t\"github.com/docker/docker/client\"\n\t\"github.com/docker/docker/pkg/stdcopy\"\n)\n\n// containerCPUs and containerMemory bound each agent container's\n// resource usage; there's no per-agent config knob for this yet (see\n// TODO.md), so every run gets the same sane default.\nconst (\n\tcontainerNanoCPUs = 2_000_000_000 // 2 CPUs\n\tcontainerMemory = 2 \u003c\u003c 30 // 2 GiB\n)\n\ntype dockerRuntime struct {\n\tcli *client.Client\n}\n\nfunc newDockerRuntime() (*dockerRuntime, error) {\n\tcli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"docker client: %w\", err)\n\t}\n\n\treturn \u0026dockerRuntime{cli: cli}, nil\n}\n\n// createContainer creates and starts a container from image with the\n// given bind mounts, kept alive with `sleep infinity` regardless of the\n// image's own entrypoint so it can be repeatedly `exec`'d into.\nfunc (d *dockerRuntime) createContainer(ctx context.Context, image string, binds []string, name string) (string, error) {\n\tresp, err := d.cli.ContainerCreate(ctx,\n\t\t\u0026container.Config{\n\t\t\tImage: image,\n\t\t\tEntrypoint: []string{\"sleep\"},\n\t\t\tCmd: []string{\"infinity\"},\n\t\t\tWorkingDir: \"/project\",\n\t\t},\n\t\t\u0026container.HostConfig{\n\t\t\tBinds: binds,\n\t\t\tResources: container.Resources{\n\t\t\t\tNanoCPUs: containerNanoCPUs,\n\t\t\t\tMemory: containerMemory,\n\t\t\t},\n\t\t},\n\t\tnil, nil, name)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"create container: %w\", err)\n\t}\n\n\tif err := d.cli.ContainerStart(ctx, resp.ID, container.StartOptions{}); err != nil {\n\t\treturn \"\", fmt.Errorf(\"start container: %w\", err)\n\t}\n\n\treturn resp.ID, nil\n}\n\n// exec runs command via `sh -c` inside containerID and returns its\n// stdout and stderr as separate strings, plus its exit code.\n//\n// No TTY is attached: a TTY would make every command believe it is\n// interactive (launching pagers, prompting for credentials, ...) and\n// the line discipline would rewrite stdout's line endings to CRLF.\n// Without a TTY, Docker frames the attached stream with its stdcopy\n// format, so the two streams are demultiplexed back apart with\n// stdcopy.StdCopy.\nfunc (d *dockerRuntime) exec(ctx context.Context, containerID, command string) (string, string, int, error) {\n\tcreated, err := d.cli.ContainerExecCreate(ctx, containerID, container.ExecOptions{\n\t\tCmd: []string{\"sh\", \"-c\", command},\n\t\t// GIT_TERMINAL_PROMPT=0 stops git from ever trying to read a\n\t\t// credential from the terminal. With no TTY attached such a\n\t\t// prompt would fail anyway, but failing fast with a clear error\n\t\t// is preferable to any chance of a hang.\n\t\tEnv: []string{\"GIT_TERMINAL_PROMPT=0\"},\n\t\tAttachStdout: true,\n\t\tAttachStderr: true,\n\t})\n\tif err != nil {\n\t\treturn \"\", \"\", 0, fmt.Errorf(\"exec create: %w\", err)\n\t}\n\n\tattached, err := d.cli.ContainerExecAttach(ctx, created.ID, container.ExecAttachOptions{})\n\tif err != nil {\n\t\treturn \"\", \"\", 0, fmt.Errorf(\"exec attach: %w\", err)\n\t}\n\tdefer attached.Close()\n\n\t// Once hijacked, this stream is a raw connection that ctx cancellation\n\t// no longer reaches — a wedged child process (anything reading a stdin\n\t// nobody attaches) would otherwise block this read forever, past the\n\t// run's deadline, with no way to recover the job. Race the read against\n\t// ctx and force-remove the container to sever the connection if it\n\t// fires.\n\ttype readResult struct {\n\t\tstdout []byte\n\t\tstderr []byte\n\t\terr error\n\t}\n\n\treadDone := make(chan readResult, 1)\n\n\tgo func() {\n\t\tvar stdout, stderr bytes.Buffer\n\n\t\t// Without a TTY the attached stream is Docker's stdcopy-framed\n\t\t// multiplex of the process's stdout and stderr; StdCopy splits\n\t\t// it back into the two separate streams.\n\t\t_, err := stdcopy.StdCopy(\u0026stdout, \u0026stderr, attached.Reader)\n\n\t\treadDone \u003c- readResult{stdout.Bytes(), stderr.Bytes(), err}\n\t}()\n\n\tvar stdout, stderr []byte","start_line":1,"end_line":120,"total_lines":163,"truncated":true}
Thinking
Now I understand the structure. The container name is `zoo-issue-%d-%s`, where `%d` is the issue number and `%s` is the agent name. If two runs for the same issue and the same agent happen concurrently, the container names will collide.
Docker container names must match `[a-zA-Z0-9][a-zA-Z0-9_.-]*`. Therefore, the uniqueness suffix needs to be composed of safe characters.
The issue says: "I like that the name has the issue-##-agent prefix. It makes it easy to test branches. But could we add something unique to it?"
So the fix is to keep the `zoo-issue-<n>-<agent>` prefix while adding a unique suffix. A short random hex string (e.g., 8 hex chars from crypto/rand) is a good choice:
- Short enough to keep the name readable
- Collision probability is negligible (2^32 space)
- Uses only hex characters, which are safe as a Docker name
Let me check where else the container name is referenced — maybe the web UI or logs reference it. I'll search for "zoo-issue" and "container" in other places.
Tool 🔧 grep_search {"query":"zoo-issue"}
Arguments
{"query":"zoo-issue"}
Result
/project/internal/agentrun/run.go:204: }, fmt.Sprintf("zoo-issue-%d-%s", ev.Index, agent.Name))
Tool 🔧 grep_search {"query":"createContainer|containerName"}
Arguments
{"query":"createContainer|containerName"}
Result
/project/internal/agentrun/docker.go:35:// createContainer creates and starts a container from image with the
/project/internal/agentrun/docker.go:38:func (d *dockerRuntime) createContainer(ctx context.Context, image string, binds []string, name string) (string, error) {
/project/internal/agentrun/docker_integration_test.go:26: containerID, err := rt.createContainer(ctx, "debian:unstable", nil, "zoo-test-run")
/project/internal/agentrun/docker_integration_test.go:68: containerID, err := rt.createContainer(ctx, "debian:unstable", nil, "zoo-test-streams")
/project/internal/agentrun/docker_integration_test.go:140: containerID, err := rt.createContainer(ctx, "golang:latest", []string{projectDir + ":/project"}, "zoo-test-git")
/project/internal/agentrun/docker_integration_test.go:221: containerID, err := rt.createContainer(ctx, "golang:latest", []string{
/project/internal/agentrun/run.go:201: containerID, err := r.docker.createContainer(ctx, dockerImage, []string{
Thinking
There's only one place where the container name is generated: line 204 of `run.go`.
Alright, let me think about the design:
1. **Goal**: Make the container name unique per run while keeping the `zoo-issue-<n>-<agent>` prefix (since it's easy to identify which branch/issue/agent it is).
2. **Uniqueness source**: A short random hex suffix. Options:
- Timestamp: not unique enough (two runs within the same second could collide), and also leaks timing info.
- UUID: 36 chars, too long.
- Random hex (8 chars = 32 bits): collision probability is about 1 in 4 billion per pair. For a small number of concurrent runs, negligible. This is the standard approach (like Docker's own random suffix, or `docker run`'s random name generation).
Actually, to be even safer, I could use 12 hex chars (48 bits) — still short. Docker's own random container name uses a random adjective-noun pair. For this use case, 8 hex chars is plenty. But let me think: how many concurrent runs could there be? Zoo runs one container per event, per agent. For the same issue + agent, collisions could happen if, for example, an issue:assigned event and a comment event on the same issue both trigger the same agent before the first run's container is deleted. The container is deleted at the end of the run (deferred). So the collision window is the entire run duration. With 8 hex chars, the probability of a collision between two runs of the same issue + agent is about 1/4 billion — negligible.
I'll go with 8 hex chars from crypto/rand.
3. **Implementation**: Add a helper function, e.g. `containerName(ev.Index, agent.Name)`, that returns `zoo-issue-<n>-<agent>-<8hex>`. Where to put it? `run.go` or `docker.go`. Since it's about container naming, `docker.go` seems appropriate, but it's used in run.go. Let me check the test file to see the existing test conventions.
Let me look at run_test.go to check the testing conventions.
Tool 🔧 read_file {"end_line":80,"path":"internal/agentrun/run_test.go","start_line":1}
Arguments
{"end_line":80,"path":"internal/agentrun/run_test.go","start_line":1}
Result
{"path":"internal/agentrun/run_test.go","content":"package agentrun\n\nimport (\n\t\"io\"\n\t\"log/slog\"\n\t\"testing\"\n\n\t\"github.com/abrander/zoo/internal/livelog\"\n)\n\n// streamHooksTestRunner builds a Runner with just the fields streamHooks\n// touches (hub + logger), so the test doesn't have to stand up Docker.\nfunc streamHooksTestRunner(t *testing.T) (*Runner, *livelog.Hub) {\n\tt.Helper()\n\n\thub := livelog.NewHub()\n\n\treturn \u0026Runner{hub: hub, logger: slog.New(slog.NewTextHandler(io.Discard, nil))}, hub\n}\n\n// collectEvents subscribes to jobID, runs fn (which publishes events\n// synchronously), and returns everything published, in order.\nfunc collectEvents(t *testing.T, hub *livelog.Hub, jobID string, fn func()) []livelog.Event {\n\tt.Helper()\n\n\tbuffered, ch, cancel := hub.Subscribe(jobID)\n\tdefer cancel()\n\n\tfn()\n\n\tevents := append([]livelog.Event(nil), buffered...)\n\ndrain:\n\tfor {\n\t\tselect {\n\t\tcase ev, ok := \u003c-ch:\n\t\t\tif !ok {\n\t\t\t\tbreak drain\n\t\t\t}\n\t\t\tevents = append(events, ev)\n\t\tdefault:\n\t\t\tbreak drain\n\t\t}\n\t}\n\n\treturn events\n}\n\nfunc hasType(events []livelog.Event, want livelog.Type) bool {\n\tfor _, ev := range events {\n\t\tif ev.Type == want {\n\t\t\treturn true\n\t\t}\n\t}\n\n\treturn false\n}\n\n// A whitespace-only content block — the model's habit on reasoning +\n// tool-call turns — must not open a block: no start/end events, and\n// nothing persisted. This is what made the live view show an empty\n// block while the static view (buildBlocks) dropped it (issue #62).\nfunc TestStreamHooksDropsWhitespaceOnlyBlocks(t *testing.T) {\n\tr, hub := streamHooksTestRunner(t)\n\n\tvar persisted []string\n\n\thooks := r.streamHooks(\"job-1\", func(stream, line string) {\n\t\tpersisted = append(persisted, stream+\":\"+line)\n\t})\n\n\tevents := collectEvents(t, hub, \"job-1\", func() {\n\t\t// A reasoning + tool-call turn where the server emits a\n\t\t// whitespace-only content field.\n\t\thooks.OnReasoningDelta(\"thinking hard\")\n\t\thooks.OnContentDelta(\" \")\n\t\thooks.OnTurnEnd()\n\t})\n\n\t// The reasoning block opened and closed normally.","start_line":1,"end_line":80,"total_lines":159,"truncated":true}
Tool 🔧 read_file {"end_line":1,"path":"internal/agentrun/run.go","start_line":1}
Arguments
{"end_line":1,"path":"internal/agentrun/run.go","start_line":1}
Result
{"path":"internal/agentrun/run.go","content":"// Package agentrun creates the throwaway per-job environment an agent","start_line":1,"end_line":1,"total_lines":503,"truncated":true}
Thinking
Let's look at the entire run.go file to check the imports and the overall structure, especially around lines 200-210.
Tool 🔧 read_file {"end_line":100,"path":"internal/agentrun/run.go","start_line":1}
Arguments
{"end_line":100,"path":"internal/agentrun/run.go","start_line":1}
Result
{"path":"internal/agentrun/run.go","content":"// Package agentrun creates the throwaway per-job environment an agent\n// runs in: a Docker container with the agent's git working tree cloned\n// inside it (authenticated with the agent's own Forgejo token), the\n// triggering event written to /event, and the tool-calling loop\n// (internal/llm + internal/tools) driven against it.\npackage agentrun\n\nimport (\n\t\"context\"\n\t_ \"embed\"\n\t\"encoding/json\"\n\t\"fmt\"\n\t\"log/slog\"\n\t\"os\"\n\t\"path/filepath\"\n\t\"strings\"\n\t\"sync\"\n\t\"time\"\n\n\t\"github.com/abrander/zoo/internal/config\"\n\t\"github.com/abrander/zoo/internal/forgejo\"\n\t\"github.com/abrander/zoo/internal/livelog\"\n\t\"github.com/abrander/zoo/internal/llm\"\n\t\"github.com/abrander/zoo/internal/store\"\n)\n\n//go:embed system.md\nvar defaultSystemPrompt string\n\n// DefaultTimeout bounds a single agent run's wall-clock time if the\n// caller doesn't override it.\nconst DefaultTimeout = 120 * time.Minute\n\ntype Runner struct {\n\tdocker *dockerRuntime\n\tforgejo *forgejo.Client\n\tstore *store.Store\n\thub *livelog.Hub\n\tcfg *config.Config\n\tlogger *slog.Logger\n\ttimeout time.Duration\n\tkeepOnFailure bool\n\n\t// masterUser is the Forgejo username that owns the shared master\n\t// token. Its comments are always directed at human operators, never\n\t// at agents, so they're kept out of the agent's briefing. An empty\n\t// value disables the filter.\n\tmasterUser string\n\n\tagentClientsMu sync.Mutex\n\tagentClients map[string]*forgejo.Client\n}\n\nfunc NewRunner(cfg *config.Config, fg *forgejo.Client, st *store.Store, hub *livelog.Hub, masterUser string, logger *slog.Logger, timeout time.Duration, keepOnFailure bool) (*Runner, error) {\n\tdocker, err := newDockerRuntime()\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tif timeout \u003c= 0 {\n\t\ttimeout = DefaultTimeout\n\t}\n\n\treturn \u0026Runner{\n\t\tdocker: docker,\n\t\tforgejo: fg,\n\t\tstore: st,\n\t\thub: hub,\n\t\tcfg: cfg,\n\t\tlogger: logger,\n\t\ttimeout: timeout,\n\t\tkeepOnFailure: keepOnFailure,\n\t\tmasterUser: masterUser,\n\t\tagentClients: make(map[string]*forgejo.Client),\n\t}, nil\n}\n\n// forgejoAs returns a Forgejo client that authenticates as the given\n// agent (using the agent's own token from config). This lets each agent\n// act as themselves on Forgejo without needing a global token with sudo\n// privileges. Clients are built once per agent and cached, since\n// constructing one costs an extra API round trip.\n//\n// If the agent has no token configured, falls back to the shared zoo\n// identity so existing deployments without per-agent tokens still work.\nfunc (r *Runner) forgejoAs(agentName, token string) *forgejo.Client {\n\tr.agentClientsMu.Lock()\n\tdefer r.agentClientsMu.Unlock()\n\n\tif c, ok := r.agentClients[agentName]; ok {\n\t\treturn c\n\t}\n\n\tvar c *forgejo.Client\n\tif token != \"\" {\n\t\tc = r.forgejo.As(token)\n\t} else {\n\t\t// Fallback: use shared identity. Optionally log a warning\n\t\t// if we ever want to enforce per-agent tokens.\n\t\tc = r.forgejo","start_line":1,"end_line":100,"total_lines":503,"truncated":true}
Thinking
Now I have the full picture. The plan is as follows:
1. Add a helper function `containerName(issue int, agent string) string` to `docker.go` (since it's about naming containers). This function returns `zoo-issue-<n>-<agent>-<8-digit hex random>`.
2. Use it at line 204 of `run.go`.
3. Add unit tests to verify the following:
- The prefix is preserved (`zoo-issue-78-greg-`)
- The suffix is 8 hex characters
- Names are unique across multiple invocations
- The name is valid as a Docker container name (matches the regex `[a-zA-Z0-9][a-zA-Z0-9_.-]*`)
Docker's container name regex is `^[a-zA-Z0-9][a-zA-Z0-9_.-]*$`. The agent name could theoretically contain characters that are invalid in a Docker name... but agent names come from configuration (e.g., "greg", "mika"), so they're probably fine. The existing code already embeds the agent name in the container name, so I won't change that behavior — it's out of scope. I'll keep the change surgical.
Let me check whether there's a TODO.md that's referenced in docker.go... there's a mention of "TODO.md" in the comments. Let me check whether it exists.
Actually, the comment says "there's no per-agent configuration knob for this yet (see TODO.md)". Let me check whether TODO.md exists — it didn't show up in the root file listing. Oh well, not my concern.
Let me also check the README to see whether container naming is documented — if so, I should update it.
Tool 🔧 grep_search {"query":"container"}
Arguments
{"query":"container"}
Result
/project/README.md:5:Zoo watches a [Forgejo](https://codeberg.org/forgejo/forgejo) instance for issue and pull request events, then dispatches them to configured AI agents running in isolated Docker containers. Each agent has its own role, LLM model, and personality — like a menagerie working together to keep your projects moving.
/project/README.md:15:- **Isolated execution** — Agents run in Docker containers with full filesystem access but no persistence between runs.
/project/README.md:98: docker_image = "golang:latest" # base image for agent containers
/project/README.md:115:operations (pull, push, ...) run inside the container with that
/project/README.md:149:| `-keep-on-failure`| `false` | Preserve container after failure for debugging |
/project/go.sum:17:github.com/containerd/errdefs v1.0.0 h1:tg5yIfIlQIrxYtu9ajqY42W3lpS19XqdxRQeEwYG8PI=
/project/go.sum:18:github.com/containerd/errdefs v1.0.0/go.mod h1:+YBYIdtsnF4Iw6nWZhJcqGSg/dwvV7tyJ/kCkyJ2k+M=
/project/go.sum:19:github.com/containerd/errdefs/pkg v0.3.0 h1:9IKJ06FvyNlexW690DXuQNx2KA2cUJXx151Xdx3ZPPE=
/project/go.sum:20:github.com/containerd/errdefs/pkg v0.3.0/go.mod h1:NJw6s9HwNuRhnjJhM7pylWwMyAkmCQvQ4GpJHEqRLVk=
/project/go.sum:21:github.com/containerd/log v0.1.0 h1:TCJt7ioM2cr/tfR8GPbGf9/VRAX8D2B4PjzCpfX540I=
/project/go.sum:22:github.com/containerd/log v0.1.0/go.mod h1:VRRf09a7mHDIRezVKTRCrOq78v577GXq3bSa3EhrzVo=
/project/go.sum:78:github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
/project/go.sum:79:github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
/project/go.sum:80:github.com/opencontainers/image-spec v1.1.1 h1:y0fUlFfIZhPF1W537XOLg0/fcx6zcHCJwooC2xJA040=
/project/go.sum:81:github.com/opencontainers/image-spec v1.1.1/go.mod h1:qpqAh3Dmcf36wStyyWU+kCeDgrGnAve2nCC8+7h8Q0M=
/project/go.mod:19: github.com/containerd/errdefs v1.0.0 // indirect
/project/go.mod:20: github.com/containerd/errdefs/pkg v0.3.0 // indirect
/project/go.mod:21: github.com/containerd/log v0.1.0 // indirect
/project/go.mod:40: github.com/opencontainers/go-digest v1.0.0 // indirect
/project/go.mod:41: github.com/opencontainers/image-spec v1.1.1 // indirect
/project/main.go:3:// Docker containers, and serves a small dashboard over the result.
/project/main.go:40: keepOnFailure = flag.Bool("keep-on-failure", false, "keep the container and clone around after a failed run, for debugging")
/project/internal/web/templates.go:105: /* ── Main container ─────────────────────────── */
/project/internal/web/templates.go:106: .container {
/project/internal/web/templates.go:411: .log-container {
/project/internal/web/templates.go:462: .log-container .block + .block {
/project/internal/web/templates.go:665: .container { padding: 1rem; }
/project/internal/web/templates.go:841:<div class="container">
/project/internal/web/templates.go:986:<div class="container">
/project/internal/web/templates.go:1035:<div class="container">
/project/internal/web/templates.go:1074: <div class="log-container" id="log">
/project/internal/web/web_test.go:157:// its scroll math against the log container (the actual scrollable
/project/internal/tools/grep_search.go:24: "Search for an extended regular expression (ERE, e.g. 'foo|bar', 'func\\(') in project files (in the project container). Supports context lines, a glob filter, and case sensitivity control.")
/project/internal/tools/context.go:3:// container (via Exec) and the Forgejo issue/PR that triggered the run
/project/internal/tools/context.go:12: // Exec runs command inside the run's container via `sh -c` and
/project/internal/tools/remove_file.go:17: "Remove an existing file in the project container.")
/project/internal/tools/write_file.go:17: "Write a new file with the given content in the project container. Use this to create new files. If the file already exists, this will fail.")
/project/internal/tools/move_file.go:18: "Rename or move a file or directory in the project container.")
/project/internal/tools/read_file.go:31: "Read lines from a file in the project container. Returns the content of the file along with metadata such as total lines.")
/project/internal/tools/list_files.go:19: "List files in a directory in the project container, optionally recursively. Hidden (dot) entries are skipped.")
/project/internal/tools/bash.go:21: "Execute a shell command in the project container. Use this to run shell commands and scripts.")
/project/internal/forgejo/client.go:36:// tree an agent's container can read.
/project/internal/forgejo/client.go:477:// authorship inside that agent's container, and its avatar URL (surfaced
/project/internal/forgejo/event.go:59: // equivalent when polling), written to /event in the agent container.
/project/internal/agentrun/context.go:11:// shell commands via docker exec against the run's container, and
/project/internal/agentrun/context.go:15: containerID string
/project/internal/agentrun/context.go:19:// Exec runs command inside the container via `sh -c` and returns its
/project/internal/agentrun/context.go:23: stdout, stderr, exitCode, err := c.docker.exec(ctx, c.containerID, command)
/project/internal/agentrun/system.md:13: at `/event` inside the container, and is also included below.
/project/internal/agentrun/system.md:21: `move_file`, `remove_file` operate on the project container.
/project/internal/agentrun/sandboxgit.go:11:// This file makes git "just work" inside the agent's container: the
/project/internal/agentrun/sandboxgit.go:13:// credential is written to the container's system gitconfig so every
/project/internal/agentrun/sandboxgit.go:37:// runSandboxGit runs `git <args...>` inside containerID (in its
/project/internal/agentrun/sandboxgit.go:41:func runSandboxGit(ctx context.Context, rt *dockerRuntime, containerID string, args ...string) (string, error) {
/project/internal/agentrun/sandboxgit.go:42: stdout, stderr, exitCode, err := rt.exec(ctx, containerID, shellGitCmd(args...))
/project/internal/agentrun/sandboxgit.go:86:// configureSandboxGit writes the container's system gitconfig so git
/project/internal/agentrun/sandboxgit.go:90:// regardless of which UID the container runs git as;
/project/internal/agentrun/sandboxgit.go:102:// The credential lives in the container's own filesystem (ephemeral,
/project/internal/agentrun/sandboxgit.go:103:// torn down with the container), never in the bind-mounted working
/project/internal/agentrun/sandboxgit.go:107:func configureSandboxGit(ctx context.Context, rt *dockerRuntime, containerID, cloneURL, user, token, name, email string) error {
/project/internal/agentrun/sandboxgit.go:108: if _, err := runSandboxGit(ctx, rt, containerID, "config", "--global", "--add", "safe.directory", "*"); err != nil {
/project/internal/agentrun/sandboxgit.go:112: if _, err := runSandboxGit(ctx, rt, containerID, "config", "--global", "user.name", name); err != nil {
/project/internal/agentrun/sandboxgit.go:116: if _, err := runSandboxGit(ctx, rt, containerID, "config", "--global", "user.email", email); err != nil {
/project/internal/agentrun/sandboxgit.go:120: if _, err := runSandboxGit(ctx, rt, containerID, "config", "--global", "http."+forgeHost(cloneURL)+".extraHeader", gitAuthHeader(user, token)); err != nil {
/project/internal/agentrun/sandboxgit.go:124: if _, err := runSandboxGit(ctx, rt, containerID, "config", "--global", "push.autoSetupRemote", "true"); err != nil {
/project/internal/agentrun/sandboxgit.go:131:// cloneAndBranch clones cloneURL into /project inside the container
/project/internal/agentrun/sandboxgit.go:136:func cloneAndBranch(ctx context.Context, rt *dockerRuntime, containerID, cloneURL, defaultBranch, branch string) error {
/project/internal/agentrun/sandboxgit.go:137: if _, err := runSandboxGit(ctx, rt, containerID, "clone", "--branch", defaultBranch, "--single-branch", cloneURL, "/project"); err != nil {
/project/internal/agentrun/sandboxgit.go:141: if _, err := runSandboxGit(ctx, rt, containerID, "checkout", "-b", branch); err != nil {
/project/internal/agentrun/sandboxgit.go:148:// clonePRHead clones cloneURL into /project inside the container and
/project/internal/agentrun/sandboxgit.go:154:func clonePRHead(ctx context.Context, rt *dockerRuntime, containerID, cloneURL, defaultBranch, headRef string, index int64) error {
/project/internal/agentrun/sandboxgit.go:155: if _, err := runSandboxGit(ctx, rt, containerID, "clone", "--branch", defaultBranch, "--single-branch", cloneURL, "/project"); err != nil {
/project/internal/agentrun/sandboxgit.go:161: if _, err := runSandboxGit(ctx, rt, containerID, "fetch", "--no-tags", "origin", fetchRef); err != nil {
/project/internal/agentrun/sandboxgit.go:165: if _, err := runSandboxGit(ctx, rt, containerID, "checkout", "-B", headRef, "FETCH_HEAD"); err != nil {
/project/internal/agentrun/docker.go:9: "github.com/docker/docker/api/types/container"
/project/internal/agentrun/docker.go:14:// containerCPUs and containerMemory bound each agent container's
/project/internal/agentrun/docker.go:18: containerNanoCPUs = 2_000_000_000 // 2 CPUs
/project/internal/agentrun/docker.go:19: containerMemory = 2 << 30 // 2 GiB
/project/internal/agentrun/docker.go:35:// createContainer creates and starts a container from image with the
/project/internal/agentrun/docker.go:38:func (d *dockerRuntime) createContainer(ctx context.Context, image string, binds []string, name string) (string, error) {
/project/internal/agentrun/docker.go:39: resp, err := d.cli.ContainerCreate(ctx,
/project/internal/agentrun/docker.go:40: &container.Config{
/project/internal/agentrun/docker.go:46: &container.HostConfig{
/project/internal/agentrun/docker.go:48: Resources: container.Resources{
/project/internal/agentrun/docker.go:49: NanoCPUs: containerNanoCPUs,
/project/internal/agentrun/docker.go:50: Memory: containerMemory,
/project/internal/agentrun/docker.go:55: return "", fmt.Errorf("create container: %w", err)
/project/internal/agentrun/docker.go:58: if err := d.cli.ContainerStart(ctx, resp.ID, container.StartOptions{}); err != nil {
/project/internal/agentrun/docker.go:59: return "", fmt.Errorf("start container: %w", err)
/project/internal/agentrun/docker.go:65:// exec runs command via `sh -c` inside containerID and returns its
/project/internal/agentrun/docker.go:74:func (d *dockerRuntime) exec(ctx context.Context, containerID, command string) (string, string, int, error) {
/project/internal/agentrun/docker.go:75: created, err := d.cli.ContainerExecCreate(ctx, containerID, container.ExecOptions{
/project/internal/agentrun/docker.go:89: attached, err := d.cli.ContainerExecAttach(ctx, created.ID, container.ExecAttachOptions{})
/project/internal/agentrun/docker.go:99: // ctx and force-remove the container to sever the connection if it
/project/internal/agentrun/docker.go:134: _ = d.cli.ContainerRemove(killCtx, containerID, container.RemoveOptions{Force: true})
/project/internal/agentrun/docker.go:140: inspect, err := d.cli.ContainerExecInspect(ctx, created.ID)
/project/internal/agentrun/docker.go:148:// remove force-stops and removes containerID, ignoring "already gone"
/project/internal/agentrun/docker.go:150:func (d *dockerRuntime) remove(ctx context.Context, containerID string) error {
/project/internal/agentrun/docker.go:152: _ = d.cli.ContainerStop(ctx, containerID, container.StopOptions{Timeout: &timeout})
/project/internal/agentrun/docker.go:154: if err := d.cli.ContainerRemove(ctx, containerID, container.RemoveOptions{Force: true}); err != nil {
Thinking
The container name is only generated in one place: line 204 of `run.go`. The README doesn't document the naming scheme, so no README update is needed.
Now let's implement:
**Design decision**: Append a short random hex suffix (8 hex chars = 32 bits of entropy) to the existing `zoo-issue-<n>-<agent>` prefix. This keeps the name human-readable and grep-able (which is what the issue author values), while making collisions between concurrent runs of the same issue + agent astronomically unlikely.
Why random hex instead of a timestamp:
- Timestamps only have second-level granularity (and even at millisecond level, two runs triggered by the same event batch could land within the same millisecond).
- Random 32 bits: the probability that two concurrent runs of the same issue + agent collide is ~1 in 4 billion — negligible.
- Hex is a valid character in Docker container names.
Where to put the helper: `docker.go` is the natural home (it's about container naming). Write it like this:
```go
// containerName builds the name for a run's container: the stable
// zoo-issue-<n>-<agent> prefix (so it's easy to spot which issue and
// agent a container belongs to) plus a short random hex suffix, so two
// concurrent runs of the same issue by the same agent never collide on
// the name.
func containerName(issue int, agent string) string {
suffix := make([]byte, 4)
if _, err := rand.Read(suffix); err != nil {
// crypto/rand failing is effectively impossible; fall back to
// a time-based value rather than failing the run over a name.
suffix = []byte(fmt.Sprintf("%08x", time.Now().UnixNano()))[4:]
}
return fmt.Sprintf("zoo-issue-%d-%s-%x", issue, agent, suffix)
}
```
Hmm, wait — about the fallback: `time.Now().UnixNano()` is 19 digits, and hex-encoding it gives 16 hex chars. Taking [4:] gives 12 hex chars, not 8. Let me think about the fallback a bit more carefully.
Actually, a simpler approach for the fallback: use the lower 32 bits of UnixNano:
```go
fallback := uint32(time.Now().UnixNano())
suffix = []byte{byte(fallback >> 24), byte(fallback >> 16), byte(fallback >> 8), byte(fallback)}
```
Or even simpler — honestly, if crypto/rand.Read fails, that's a system-level failure (entropy exhaustion), and failing the run with a clear error is acceptable and arguably more honest. But the existing code style in this repo tends to degrade gracefully (see the review-detail fallback in run.go). Hmm.
Actually, let me reconsider: is the fallback even worth it? The `crypto/rand.Read` error path is essentially unreachable on any modern OS (Go's crypto/rand uses getrandom on Linux, which blocks until entropy is available). Failing the run with a clear error message is clean and simple. But then `containerName` would need to return an error, which complicates the call site.
An alternative: keep it simple — return a string, and on the (practically impossible) error, fall back to a time-based suffix. Let me write a clean fallback:
```go
func containerName(issue int, agent string) string {
var buf [4]byte
if _, err := rand.Read(buf[:]); err != nil {
// crypto/rand is effectively infallible on supported platforms;
// if it ever fails, a time-based suffix still keeps names unique
// enough for concurrent runs.
nanos := uint32(time.Now().UnixNano())
buf = [4]byte{byte(nanos >> 24), byte(nanos >> 16), byte(nanos >> 8), byte(nanos)}
}
return fmt.Sprintf("zoo-issue-%d-%s-%x", issue, agent, buf[:])
}
```
This is clean. `%x` on a 4-byte slice gives 8 hex chars.
Wait, `buf` is `[4]byte`, and `buf[:]` is a 4-byte slice. `fmt.Sprintf("%x", buf[:])` → 8 hex chars. Good.
Then in run.go:
```go
containerID, err := r.docker.createContainer(ctx, dockerImage, []string{
projectDir + ":/project",
eventPath + ":/event:ro",
}, containerName(ev.Index, agent.Name))
```
Note: `ev.Index` — let me check its type. In run.go it's used as `fmt.Sprintf("issue-%d-%s", ev.Index, agent.Name)`, so it's an integer type (probably int64). Let me check event.go.
Also, `clonePRHead` takes `index int64`. So `ev.Index` is int64. My helper should take `issue int64` to match.
Next, the test. Let me write a unit test in docker.go or a new test file. The existing tests are in `docker_integration_test.go` (which requires Docker). Let me check how the integration tests are gated (build tag?) so I can decide where to put a pure unit test.
Now let me check the event type and the integration test setup:
Tool 🔧 read_file {"end_line":80,"path":"internal/forgejo/event.go","start_line":1}
Arguments
{"end_line":80,"path":"internal/forgejo/event.go","start_line":1}
Result
{"path":"internal/forgejo/event.go","content":"package forgejo\n\nimport \"encoding/json\"\n\n// Event kinds, matching the values used as event block labels in\n// config.Config (config avoids importing this package, so the kind\n// strings are duplicated by value, not by identity).\nconst (\n\tEventIssueNew = \"issue:new\"\n\tEventIssueComment = \"issue:comment\"\n\tEventIssueAssigned = \"issue:assigned\"\n\tEventPRNew = \"pr:new\"\n\tEventPRReview = \"pr:review\"\n)\n\n// Event is the normalized shape produced by both the webhook receiver and\n// the polling fallback, and is what the scheduler dispatches on.\ntype Event struct {\n\tKind string\n\n\t// ID uniquely identifies this event for dedup, regardless of whether\n\t// it arrived via webhook or polling.\n\tID string\n\n\tOwner, Repo string\n\tIndex int64 // issue or PR number\n\n\tTitle, Body string\n\tAuthor string\n\n\t// Assignee is set for EventIssueAssigned: the Forgejo username the\n\t// issue was assigned to.\n\tAssignee string\n\n\t// PRAuthor is set for PR events: the Forgejo username of the user\n\t// who opened the pull request. For EventPRReview the scheduler\n\t// resolves the event to this user's agent, so the agent that opened\n\t// the PR reacts to the review of it.\n\tPRAuthor string\n\n\t// Comment is set for EventIssueComment.\n\tComment string\n\n\t// Review fields, set for EventPRReview: the submitted review's id,\n\t// verdict, and body. Inline review comments are not part of the\n\t// webhook payload, so they're fetched separately when briefing the\n\t// agent (see Client.ReviewDetail).\n\tReviewID int64\n\tReviewState string\n\tReviewBody string\n\n\t// HeadRef is set for PR events when the source payload carries the\n\t// PR's head branch: the branch the PR's changes live on. A run\n\t// reacting to the PR checks it out so its pushes update the PR\n\t// directly.\n\tHeadRef string\n\n\t// Raw is the full source payload (webhook body, or a synthesized\n\t// equivalent when polling), written to /event in the agent container.\n\tRaw json.RawMessage\n}","start_line":1,"end_line":61,"total_lines":61,"truncated":false}
Tool 🔧 read_file {"end_line":30,"path":"1","start_line":1}
Arguments
{"end_line":30,"path":"1","start_line":1}
Result
ERROR CALLING TOOL: read "1": command exited with status 1: read_file: no such file: /project/1
Thinking
`ev.Index` is `int64`. Let's check the header of the integration test file to see how the Docker tests are gated.
Tool 🔧 read_file {"end_line":30,"path":"internal/agentrun/docker_integration_test.go","start_line":1}
Arguments
{"end_line":30,"path":"internal/agentrun/docker_integration_test.go","start_line":1}
Result
{"path":"internal/agentrun/docker_integration_test.go","content":"//go:build docker\n\n// Run with: go test -tags docker ./internal/agentrun/...\n// Requires a reachable Docker daemon (DOCKER_HOST or the default socket).\npackage agentrun\n\nimport (\n\t\"context\"\n\t\"os\"\n\t\"os/exec\"\n\t\"path/filepath\"\n\t\"strings\"\n\t\"testing\"\n\t\"time\"\n)\n\nfunc TestDockerRuntimeExecRoundTrip(t *testing.T) {\n\trt, err := newDockerRuntime()\n\tif err != nil {\n\t\tt.Fatalf(\"docker client: %v\", err)\n\t}\n\n\tctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)\n\tdefer cancel()\n\n\tcontainerID, err := rt.createContainer(ctx, \"debian:unstable\", nil, \"zoo-test-run\")\n\tif err != nil {\n\t\tt.Fatalf(\"create container: %v\", err)\n\t}\n\tdefer rt.remove(context.Background(), containerID)","start_line":1,"end_line":30,"total_lines":287,"truncated":true}
Thinking
Docker integration tests are behind the `docker` build tag. My unit test for `containerName` doesn't need Docker, so I'll add it as a regular test. I could put it in `docker_integration_test.go`, but that's gated by the build tag. Better to put it in a new file `docker_test.go` (no build tag) or in `run_test.go`. Since `containerName` is in `docker.go`, I'll create `docker_test.go`.
Alright, let me write the implementation:
1. In `docker.go`: add a `containerName(issue int64, agent string) string` helper that uses `crypto/rand`.
2. In `run.go`: use it.
3. In `docker_test.go`: unit test.
Let me write the code.
In docker.go, add the import: `crypto/rand`.
```go
// containerName builds the name for a run's container: the stable
// zoo-issue-<n>-<agent> prefix, which makes it easy to spot which issue
// and agent a container belongs to, plus a short random hex suffix so
// two concurrent runs of the same issue by the same agent never collide
// on the name (issue #78).
func containerName(issue int64, agent string) string {
var suffix [4]byte
if _, err := rand.Read(suffix[:]); err != nil {
// crypto/rand failing is effectively impossible on supported
// platforms; a time-based suffix still keeps names unique for
// concurrent runs rather than failing the run over a name.
nanos := uint32(time.Now().UnixNano())
suffix = [4]byte{byte(nanos >> 24), byte(nanos >> 16), byte(nanos >> 8), byte(nanos)}
}
return fmt.Sprintf("zoo-issue-%d-%s-%x", issue, agent, suffix[:])
}
```
docker.go already imports `time` and `fmt`. I need to add `crypto/rand`.
Test in docker_test.go:
```go
package agentrun
import (
"regexp"
"strings"
"testing"
)
// Docker container names must match this (see the Docker daemon's
// NameRe). The prefix is the stable, human-readable part; the suffix
// must be hex so the whole name stays valid.
var dockerNameRe = regexp.MustCompile(`^[a-zA-Z0-9][a-zA-Z0-9_.-]*$`)
func TestContainerNameKeepsPrefixAndIsUnique(t *testing.T) {
seen := make(map[string]bool)
for i := 0; i < 1000; i++ {
name := containerName(78, "greg")
if !strings.HasPrefix(name, "zoo-issue-78-greg-") {
t.Fatalf("name %q does not keep the zoo-issue-78-greg- prefix", name)
}
suffix := name[len("zoo-issue-78-greg-"):]
if len(suffix) != 8 {
t.Fatalf("suffix %q is %d chars, want 8", suffix, len(suffix))
}
for _, c := range suffix {
if !strings.ContainsRune("0123456789abcdef", c) {
t.Fatalf("suffix %q contains non-hex char %q", suffix, c)
}
}
if !dockerNameRe.MatchString(name) {
t.Fatalf("name %q is not a valid Docker container name", name)
}
if seen[name] {
t.Fatalf("generated duplicate container name %q", name)
}
seen[name] = true
}
}
```
1000 iterations of 32-bit random: by the birthday paradox, the collision probability is about 1000²/2 / 2³² ≈ 1.16e-7 — negligible, so this test is stable (won't flake).
I might also test that different agents/issues produce different prefixes:
```go
func TestContainerNameDistinguishesIssueAndAgent(t *testing.T) {
a := containerName(78, "greg")
b := containerName(78, "mika")
c := containerName(79, "greg")
if strings.HasPrefix(a, "zoo-issue-78-mika-") || strings.HasPrefix(b, "zoo-issue-78-greg-") {
t.Fatalf("agent names mixed up: %q vs %q", a, b)
}
...
}
```
Hmm, this is a bit clunky. Simpler: just verify the prefix directly.
Actually, let me keep the test focused but complete. I'll write it like this:
```go
package agentrun
import (
"regexp"
"strings"
"testing"
)
// dockerNameRe mirrors the Docker daemon's container-name validation
// (NameRe in the moby source).
var dockerNameRe = regexp.MustCompile(`^[a-zA-Z0-9][a-zA-Z0-9_.-]*$`)
// The name must keep the human-readable zoo-issue-<n>-<agent> prefix
// (easy to spot which issue and agent a container belongs to) and add a
// unique 8-hex-char suffix, so concurrent runs of the same issue by the
// same agent never collide (issue #78).
func TestContainerName(t *testing.T) {
seen := make(map[string]bool)
for i := 0; i < 1000; i++ {
name := containerName(78, "greg")
if !strings.HasPrefix(name, "zoo-issue-78-greg-") {
t.Fatalf("name %q lost its zoo-issue-78-greg- prefix", name)
}
suffix := name[len("zoo-issue-78-greg-"):]
if len(suffix) != 8 || !isHex(suffix) {
t.Fatalf("suffix %q is not 8 hex chars", suffix)
}
if !dockerNameRe.MatchString(name) {
t.Fatalf("name %q is not a valid Docker container name", name)
}
if seen[name] {
t.Fatalf("duplicate container name %q", name)
}
seen[name] = true
}
}
func isHex(s string) bool {
for _, c := range s {
if !strings.ContainsRune("0123456789abcdef", c) {
return false
}
}
return true
}
```
Wait, `%x` produces lowercase hex. Good.
Next, let me check the Makefile to see how tests are run:
Let me check the Makefile and the rest of run.go around the container creation:
Tool 🔧 read_file {"end_line":20,"path":"Makefile","start_line":1}
Arguments
{"end_line":20,"path":"Makefile","start_line":1}
Result
{"path":"Makefile","content":"all: zoo\n\n.PHONY: docker-image doc zoo\n\nzoo:\n\tCGO_ENABLED=0 go build -o zoo .\n\ndocker-image:\n\tdocker build -t devcont:latest docker\n\n${GOPATH}/bin/pkgsite:\n\tgo install golang.org/x/pkgsite/cmd/pkgsite@latest\n\ndoc: ${GOPATH}/bin/pkgsite\n\t(sleep 1 ; xdg-open \"http://127.0.0.1:1234/github.com/abrander/zoo\") \u0026\n\t${GOPATH}/bin/pkgsite -http=:1234","start_line":1,"end_line":16,"total_lines":16,"truncated":false}
Tool 🔧 read_file {"end_line":20,"path":"internal/forgejo.go","start_line":1}
Arguments
{"end_line":20,"path":"internal/forgejo.go","start_line":1}
Result
ERROR CALLING TOOL: read "internal/forgejo.go": command exited with status 1: read_file: no such file: /project/internal/forgejo.go
Thinking
OK. Now I have everything I need. Let's implement the changes:
1. **`internal/agentrun/docker.go`**: Add a `containerName` helper using `crypto/rand`.
2. **`internal/agentrun/run.go`**: Use `containerName(ev.Index, agent.Name)` instead of inline `fmt.Sprintf`.
3. **`internal/agentrun/docker_test.go`**: New unit test (no Docker required).
Let's make the edits.
I've grasped the overall picture. The container name `zoo-issue-<n>-<agent>` is generated inline at `run.go:204`. If two runs for the same issue and same agent overlap (e.g., an `issue:assigned` event and a comment event on the same issue), the names will collide. I'll keep the readable prefix and add a short random hex suffix.
Let's make the changes:
</invoke>
</invoke>
</parameter>
Tool 🔧 edit_file {"find":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"\n\n\t\"github.com/docker/docker/api/types/container\"\n\t\"github.com/docker/docker/client\"\n\t\"github.com/docker/docker/pkg/stdcopy\"\n)","path":"internal/agentrun/docker.go","replace":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"\n\n\t\"github.com/docker/docker/api/types/container\"\n\t\"github.com/docker/docker/client\"\n\t\"github.com/docker/docker/pkg/stdcopy\"\n)","replace_all":false}
Arguments
{"find":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"\n\n\t\"github.com/docker/docker/api/types/container\"\n\t\"github.com/docker/docker/client\"\n\t\"github.com/docker/docker/pkg/stdcopy\"\n)","path":"internal/agentrun/docker.go","replace":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"\n\n\t\"github.com/docker/docker/api/types/container\"\n\t\"github.com/docker/docker/client\"\n\t\"github.com/docker/docker/pkg/stdcopy\"\n)","replace_all":false}
Result
1 occurrences replaced
Thinking
Oops, that edit didn't change anything (I pasted the same text). Let me redo it properly — I need to add the `crypto/rand` import.
That edit was a no-op (identical text). Let me do it properly:
Tool 🔧 edit_file {"find":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"","path":"internal/runner/docker.go","replace":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"crypto/rand\"\n\t\"fmt\"\n\t\"time\""}
Arguments
{"find":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"","path":"internal/runner/docker.go","replace":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"crypto/rand\"\n\t\"fmt\"\n\t\"time\""}
Result
ERROR CALLING TOOL: command exited with status 1: base64: /project/internal/runner/docker.go: No such file or directory
Thinking
Wrong path — it's `internal/agentrun/docker.go`, not `internal/runner/docker.go`. Let me fix it.
Wrong path — it's `internal/agentrun/docker.go`:
Tool 🔧 edit_file {"find":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"","path":"internal/agentrun/docker.go","replace":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"crypto/rand\"\n\t\"fmt\"\n\t\"time\""}
Arguments
{"find":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"time\"","path":"internal/agentrun/docker.go","replace":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"crypto/rand\"\n\t\"fmt\"\n\t\"time\""}
Result
1 occurrences replaced
Thinking
Next, let's add the `containerName` helper to docker.go. I'll add it right after the constants block, before `type dockerRuntime`.
Now add the `containerName` helper:
Tool 🔧 edit_file {"find":"const (\n\tcontainerNanoCPUs = 2_000_000_000 // 2 CPUs\n\tcontainerMemory = 2 << 30 // 2 GiB\n)\n\ntype dockerRuntime struct {","path":"internal/agentrun/docker.go","replace":"const (\n\tcontainerNanoCPUs = 2_000_000_000 // 2 CPUs\n\tcontainerMemory = 2 << 30 // 2 GiB\n)\n\n// containerName builds the name for a run's container: the stable\n// zoo-issue-<n>-<agent> prefix, which keeps it easy to spot which issue\n// and agent a container belongs to, plus a short random hex suffix so\n// two concurrent runs of the same issue by the same agent never collide\n// on the name (issue #78).\nfunc containerName(issue int64, agent string) string {\n\tvar suffix [4]byte\n\n\tif _, err := rand.Read(suffix[:]); err != nil {\n\t\t// crypto/rand failing is effectively impossible on supported\n\t\t// platforms; a time-based suffix still keeps concurrent names\n\t\t// distinct rather than failing the run over a name.\n\t\tnanos := uint32(time.Now().UnixNano())\n\t\tsuffix = [4]byte{byte(nanos >> 24), byte(nanos >> 16), byte(nanos >> 8), byte(nanos)}\n\t}\n\n\treturn fmt.Sprintf(\"zoo-issue-%d-%s-%x\", issue, agent, suffix[:])\n}\n\ntype dockerRuntime struct {"}
Arguments
{"find":"const (\n\tcontainerNanoCPUs = 2_000_000_000 // 2 CPUs\n\tcontainerMemory = 2 << 30 // 2 GiB\n)\n\ntype dockerRuntime struct {","path":"internal/agentrun/docker.go","replace":"const (\n\tcontainerNanoCPUs = 2_000_000_000 // 2 CPUs\n\tcontainerMemory = 2 << 30 // 2 GiB\n)\n\n// containerName builds the name for a run's container: the stable\n// zoo-issue-<n>-<agent> prefix, which keeps it easy to spot which issue\n// and agent a container belongs to, plus a short random hex suffix so\n// two concurrent runs of the same issue by the same agent never collide\n// on the name (issue #78).\nfunc containerName(issue int64, agent string) string {\n\tvar suffix [4]byte\n\n\tif _, err := rand.Read(suffix[:]); err != nil {\n\t\t// crypto/rand failing is effectively impossible on supported\n\t\t// platforms; a time-based suffix still keeps concurrent names\n\t\t// distinct rather than failing the run over a name.\n\t\tnanos := uint32(time.Now().UnixNano())\n\t\tsuffix = [4]byte{byte(nanos >> 24), byte(nanos >> 16), byte(nanos >> 8), byte(nanos)}\n\t}\n\n\treturn fmt.Sprintf(\"zoo-issue-%d-%s-%x\", issue, agent, suffix[:])\n}\n\ntype dockerRuntime struct {"}
Result
1 occurrences replaced
Thinking
Next, update `run.go` to use the helper:
Tool 🔧 edit_file {"find":"\tcontainerID, err := r.docker.createContainer(ctx, dockerImage, []string{\n\t\tprojectDir + \":/project\",\n\t\teventPath + \":/event:ro\",\n\t}, fmt.Sprintf(\"zoo-issue-%d-%s\", ev.Index, agent.Name))","path":"internal/agentrun/run.go","replace":"\tcontainerID, err := r.docker.createContainer(ctx, dockerImage, []string{\n\t\tprojectDir + \":/project\",\n\t\teventPath + \":/event:ro\",\n\t}, containerName(ev.Index, agent.Name))"}
Arguments
{"find":"\tcontainerID, err := r.docker.createContainer(ctx, dockerImage, []string{\n\t\tprojectDir + \":/project\",\n\t\teventPath + \":/event:ro\",\n\t}, fmt.Sprintf(\"zoo-issue-%d-%s\", ev.Index, agent.Name))","path":"internal/agentrun/run.go","replace":"\tcontainerID, err := r.docker.createContainer(ctx, dockerImage, []string{\n\t\tprojectDir + \":/project\",\n\t\teventPath + \":/event:ro\",\n\t}, containerName(ev.Index, agent.Name))"}
Result
1 occurrences replaced
Thinking
Next, I'll check whether `fmt` is still being used in run.go (it definitely is — there are many other `fmt.Errorf` calls). Let me verify the build. Also, I'll create the test file `docker_test.go`.
Now the unit test (no Docker needed, so no build tag):
Tool 🔧 write_file {"content":"package agentrun\n\nimport (\n\t\"regexp\"\n\t\"strings\"\n\t\"testing\"\n)\n\n// dockerNameRe mirrors the Docker daemon's container-name validation\n// (NameRe in the moby source): an alphanumeric first character, then\n// alphanumerics, dots, underscores, or dashes.\nvar dockerNameRe = regexp.MustCompile(`^[a-zA-Z0-9][a-zA-Z0-9_.-]*$`)\n\n// The name must keep the human-readable zoo-issue-<n>-<agent> prefix\n// (easy to spot which issue and agent a container belongs to) and add a\n// unique 8-hex-char suffix, so concurrent runs of the same issue by the\n// same agent never collide on the name (issue #78).\nfunc TestContainerName(t *testing.T) {\n\tconst prefix = \"zoo-issue-78-greg-\"\n\n\tseen := make(map[string]bool)\n\n\tfor i := 0; i < 1000; i++ {\n\t\tname := containerName(78, \"greg\")\n\n\t\tif !strings.HasPrefix(name, prefix) {\n\t\t\tt.Fatalf(\"name %q lost its %s prefix\", name, prefix)\n\t\t}\n\n\t\tsuffix := name[len(prefix):]\n\n\t\tif len(suffix) != 8 || !isLowerHex(suffix) {\n\t\t\tt.Fatalf(\"suffix %q is not 8 lowercase hex chars\", suffix)\n\t\t}\n\n\t\tif !dockerNameRe.MatchString(name) {\n\t\t\tt.Fatalf(\"name %q is not a valid Docker container name\", name)\n\t\t}\n\n\t\tif seen[name] {\n\t\t\tt.Fatalf(\"generated duplicate container name %q\", name)\n\t\t}\n\n\t\tseen[name] = true\n\t}\n}\n\n// Different issues and agents must stay distinguishable in the name.\nfunc TestContainerNameDistinguishesIssueAndAgent(t *testing.T) {\n\tif !strings.HasPrefix(containerName(78, \"greg\"), \"zoo-issue-78-greg-\") {\n\t\tt.Fatalf(\"issue 78 / greg: wrong prefix\")\n\t}\n\n\tif !strings.HasPrefix(containerName(78, \"mika\"), \"zoo-issue-78-mika-\") {\n\t\tt.Fatalf(\"issue 78 / mika: wrong prefix\")\n\t}\n\n\tif !strings.HasPrefix(containerName(79, \"greg\"), \"zoo-issue-79-greg-\") {\n\t\tt.Fatalf(\"issue 79 / greg: wrong prefix\")\n\t}\n}\n\nfunc isLowerHex(s string) bool {\n\tfor _, c := range s {\n\t\tif !strings.ContainsRune(\"0123456789abcdef\", c) {\n\t\t\treturn false\n\t\t}\n\t}\n\n\treturn true\n}\n","path":"internal/agentrun/docker_test.go"}
Arguments
{"content":"package agentrun\n\nimport (\n\t\"regexp\"\n\t\"strings\"\n\t\"testing\"\n)\n\n// dockerNameRe mirrors the Docker daemon's container-name validation\n// (NameRe in the moby source): an alphanumeric first character, then\n// alphanumerics, dots, underscores, or dashes.\nvar dockerNameRe = regexp.MustCompile(`^[a-zA-Z0-9][a-zA-Z0-9_.-]*$`)\n\n// The name must keep the human-readable zoo-issue-<n>-<agent> prefix\n// (easy to spot which issue and agent a container belongs to) and add a\n// unique 8-hex-char suffix, so concurrent runs of the same issue by the\n// same agent never collide on the name (issue #78).\nfunc TestContainerName(t *testing.T) {\n\tconst prefix = \"zoo-issue-78-greg-\"\n\n\tseen := make(map[string]bool)\n\n\tfor i := 0; i < 1000; i++ {\n\t\tname := containerName(78, \"greg\")\n\n\t\tif !strings.HasPrefix(name, prefix) {\n\t\t\tt.Fatalf(\"name %q lost its %s prefix\", name, prefix)\n\t\t}\n\n\t\tsuffix := name[len(prefix):]\n\n\t\tif len(suffix) != 8 || !isLowerHex(suffix) {\n\t\t\tt.Fatalf(\"suffix %q is not 8 lowercase hex chars\", suffix)\n\t\t}\n\n\t\tif !dockerNameRe.MatchString(name) {\n\t\t\tt.Fatalf(\"name %q is not a valid Docker container name\", name)\n\t\t}\n\n\t\tif seen[name] {\n\t\t\tt.Fatalf(\"generated duplicate container name %q\", name)\n\t\t}\n\n\t\tseen[name] = true\n\t}\n}\n\n// Different issues and agents must stay distinguishable in the name.\nfunc TestContainerNameDistinguishesIssueAndAgent(t *testing.T) {\n\tif !strings.HasPrefix(containerName(78, \"greg\"), \"zoo-issue-78-greg-\") {\n\t\tt.Fatalf(\"issue 78 / greg: wrong prefix\")\n\t}\n\n\tif !strings.HasPrefix(containerName(78, \"mika\"), \"zoo-issue-78-mika-\") {\n\t\tt.Fatalf(\"issue 78 / mika: wrong prefix\")\n\t}\n\n\tif !strings.HasPrefix(containerName(79, \"greg\"), \"zoo-issue-79-greg-\") {\n\t\tt.Fatalf(\"issue 79 / greg: wrong prefix\")\n\t}\n}\n\nfunc isLowerHex(s string) bool {\n\tfor _, c := range s {\n\t\tif !strings.ContainsRune(\"0123456789abcdef\", c) {\n\t\t\treturn false\n\t\t}\n\t}\n\n\treturn true\n}\n","path":"internal/agentrun/docker_test.go"}
Result
OK
Thinking
Alright, let's build and run the tests. Note: 1000 draws from 2^32 — the probability of a collision by the birthday paradox is ≈ 1000²/(2·2^32) ≈ 1.16e-7, so this test won't flake (become unstable).
Now build and test:
Tool 🔧 bash {"command":"cd /project && gofmt -l . && go vet ./... && go build ./... && go test ./internal/agentrun/ -run 'TestContainerName' -v"}
Arguments
{"command":"cd /project && gofmt -l . && go vet ./... && go build ./... && go test ./internal/agentrun/ -run 'TestContainerName' -v"}
Result
internal/web/web.go === RUN TestContainerName --- PASS: TestContainerName (0.00s) === RUN TestContainerNameDistinguishesIssueAndAgent --- PASS: TestContainerNameDistinguishesIssueAndAgent (0.00s) PASS ok github.com/abrander/zoo/internal/agentrun 0.005s go: downloading github.com/docker/docker v28.5.2+incompatible go: downloading github.com/hashicorp/hcl/v2 v2.24.0 go: downloading codeberg.org/mvdkleijn/forgejo-sdk/forgejo/v2 v2.2.0 go: downloading github.com/google/uuid v1.6.0 go: downloading modernc.org/sqlite v1.56.0 go: downloading github.com/docker/go-connections v0.8.1 go: downloading github.com/docker/go-units v0.5.0 go: downloading github.com/moby/docker-image-spec v1.3.1 go: downloading github.com/opencontainers/image-spec v1.1.1 go: downloading github.com/containerd/errdefs v1.0.0 go: downloading github.com/containerd/errdefs/pkg v0.3.0 go: downloading github.com/distribution/reference v0.6.0 go: downloading github.com/opencontainers/go-digest v1.0.0 go: downloading github.com/pkg/errors v0.9.1 go: downloading go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.70.0 go: downloading go.opentelemetry.io/otel/trace v1.45.0 go: downloading go.opentelemetry.io/otel v1.45.0 go: downloading github.com/42wim/httpsig v1.2.3 go: downloading github.com/go-fed/httpsig v1.1.0 go: downloading github.com/hashicorp/go-version v1.7.0 go: downloading golang.org/x/crypto v0.39.0 go: downloading github.com/felixge/httpsnoop v1.1.0 go: downloading go.opentelemetry.io/otel/metric v1.45.0 go: downloading github.com/agext/levenshtein v1.2.1 go: downloading github.com/apparentlymart/go-textseg/v15 v15.0.0 go: downloading github.com/mitchellh/go-wordwrap v1.0.1 go: downloading github.com/zclconf/go-cty v1.16.3 go: downloading github.com/go-logr/logr v1.4.4 go: downloading golang.org/x/sys v0.47.0 go: downloading github.com/google/go-cmp v0.7.0 go: downloading github.com/go-logr/stdr v1.2.2 go: downloading go.opentelemetry.io/auto/sdk v1.2.1 go: downloading github.com/cespare/xxhash/v2 v2.3.0 go: downloading golang.org/x/text v0.40.0 go: downloading modernc.org/libc v1.74.4 go: downloading github.com/dustin/go-humanize v1.0.1 go: downloading modernc.org/mathutil v1.7.1 go: downloading modernc.org/memory v1.11.0 go: downloading github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec
Thinking
The tests pass, and the build is fine too. Note: `gofmt -l` flagged `internal/web/web.go` — this is a pre-existing formatting issue, not caused by my changes. Let me verify that the files I modified are gofmt-clean, and confirm that web.go was already unformatted before my changes (it should be, since I haven't touched it).
Let me verify:
1. That the files I modified are gofmt-clean.
2. That web.go was already unformatted before my changes (git status / git stash check).
3. Run the full test suite (non-docker).
Tests pass. `gofmt` flagged `internal/web/web.go` — let me confirm that's pre-existing and not mine, and run the full test suite:
Tool 🔧 bash {"command":"cd /project && git status --short && git stash -q && gofmt -l . ; git stash pop -q && gofmt -l internal/agentrun/ && echo \"agentrun gofmt clean\""}
Arguments
{"command":"cd /project && git status --short && git stash -q && gofmt -l . ; git stash pop -q && gofmt -l internal/agentrun/ && echo \"agentrun gofmt clean\""}
Result
M internal/agentrun/docker.go M internal/agentrun/run.go ?? internal/agentrun/docker_test.go internal/web/web.go agentrun gofmt clean
Thinking
Confirmed: `internal/web/web.go` was already unformatted before my changes (it shows up in `gofmt -l` even with my changes stashed). My files are clean.
Next, I'll run the full test suite (excluding the docker-tagged integration tests).
`web.go` was already unformatted before my change — not mine to fix. Now the full test suite:
Tool 🔧 bash {"command":"cd /project && true; cd /project && go test ./... 2>&1 | tail -20"}
Arguments
{"command":"cd /project && true; cd /project && go test ./... 2>&1 | tail -20"}
Result
? github.com/abrander/zoo [no test files] ok github.com/abrander/zoo/internal/agentrun 0.027s ok github.com/abrander/zoo/internal/config 0.006s ok github.com/abrander/zoo/internal/forgejo 1.802s ok github.com/abrander/zoo/internal/livelog 0.052s ok github.com/abrander/zoo/internal/llm 0.003s ok github.com/abrander/zoo/internal/scheduler 3.258s ok github.com/abrander/zoo/internal/store 1.746s ok github.com/abrander/zoo/internal/tools 0.003s ok github.com/abrander/zoo/internal/web 1.537s
Thinking
All tests passed. To confirm that everything is fine, I'll do a final review of the diff, and then commit and push.
All green. Final review of the diff:
Tool 🔧 bash {"command":"cd /project && git diff"}
Arguments
{"command":"cd /project && git diff"}
Result
diff --git a/internal/agentrun/docker.go b/internal/agentrun/docker.go
index 26304ef..82afa88 100644
--- a/internal/agentrun/docker.go
+++ b/internal/agentrun/docker.go
@@ -3,6 +3,7 @@ package agentrun
import (
"bytes"
"context"
+ "crypto/rand"
"fmt"
"time"
@@ -19,6 +20,25 @@ const (
containerMemory = 2 << 30 // 2 GiB
)
+// containerName builds the name for a run's container: the stable
+// zoo-issue-<n>-<agent> prefix, which keeps it easy to spot which issue
+// and agent a container belongs to, plus a short random hex suffix so
+// two concurrent runs of the same issue by the same agent never collide
+// on the name (issue #78).
+func containerName(issue int64, agent string) string {
+ var suffix [4]byte
+
+ if _, err := rand.Read(suffix[:]); err != nil {
+ // crypto/rand failing is effectively impossible on supported
+ // platforms; a time-based suffix still keeps concurrent names
+ // distinct rather than failing the run over a name.
+ nanos := uint32(time.Now().UnixNano())
+ suffix = [4]byte{byte(nanos >> 24), byte(nanos >> 16), byte(nanos >> 8), byte(nanos)}
+ }
+
+ return fmt.Sprintf("zoo-issue-%d-%s-%x", issue, agent, suffix[:])
+}
+
type dockerRuntime struct {
cli *client.Client
}
diff --git a/internal/agentrun/run.go b/internal/agentrun/run.go
index beec210..4cfd87f 100644
--- a/internal/agentrun/run.go
+++ b/internal/agentrun/run.go
@@ -201,7 +201,7 @@ func (r *Runner) Run(ctx context.Context, jobID string, agent config.AgentConfig
containerID, err := r.docker.createContainer(ctx, dockerImage, []string{
projectDir + ":/project",
eventPath + ":/event:ro",
- }, fmt.Sprintf("zoo-issue-%d-%s", ev.Index, agent.Name))
+ }, containerName(ev.Index, agent.Name))
if err != nil {
return fmt.Errorf("start container: %w", err)
}
Thinking
The diff looks clean and minimal. Let's commit and push, then open a PR.
Wait — should I double-check whether `fmt` is still being used in run.go? Yes, `fmt.Errorf` is used extensively, and the build passed, so no problem.
Another consideration: the issue body says "it makes it easy to test branches" — the branch name `issue-##-agent` is a separate thing (line 149 of run.go), and that's intentionally stable (so the agent can re-push to the same branch). The issue is only about the container name, and I kept the branch name as-is. Good — that's the surgical (minimal) change that was requested.
Let's commit and push.
The diff is clean and surgical — the branch name (`issue-##-agent`, which is intentionally stable for re-pushing) is unchanged; only the container name gains the unique suffix. Commit and push:
Tool 🔧 bash {"command":"cd /project && git add internal/agentrun/docker.go internal/agentrun/run.go internal/agentrun/docker_test.go && git commit -m \"Make agent container names unique per run\n\nKeep the human-readable zoo-issue-<n>-<agent> prefix but append a\nshort random hex suffix (8 hex chars, crypto/rand) so two concurrent\nruns of the same issue by the same agent can no longer collide on the\ncontainer name.\n\nCloses #78\" && git push origin issue-78-greg"}
Arguments
{"command":"cd /project && git add internal/agentrun/docker.go internal/agentrun/run.go internal/agentrun/docker_test.go && git commit -m \"Make agent container names unique per run\n\nKeep the human-readable zoo-issue-<n>-<agent> prefix but append a\nshort random hex suffix (8 hex chars, crypto/rand) so two concurrent\nruns of the same issue by the same agent can no longer collide on the\ncontainer name.\n\nCloses #78\" && git push origin issue-78-greg"}
Result
[issue-78-greg db98498] Make agent container names unique per run 3 files changed, 92 insertions(+), 1 deletion(-) create mode 100644 internal/agentrun/docker_test.go To https://code.stdio.dk/abrander/zoo.git * [new branch] issue-78-greg -> issue-78-greg
Thinking
The push succeeded. Next, I'll open a pull request referencing issue #78 with a closing keyword.
Now open the PR:
Tool 🔧 open_pull_request {"base":"main","body":"## Problem\n\nAgent container names were `zoo-issue-<n>-<agent>` — deterministic per issue + agent. When two runs of the same issue by the same agent overlapped (e.g. an `issue:assigned` event and a comment event on the same issue, or a re-run before the previous container was torn down), the second `ContainerCreate` failed with a name collision.\n\n## Change\n\nKept the readable prefix (which makes it easy to spot which issue/agent a container belongs to, as requested in the issue) and appended a short random hex suffix:\n\n```\nzoo-issue-78-greg-a1b2c3d4\n```\n\n- `containerName(issue, agent)` in `internal/agentrun/docker.go` draws 4 bytes from `crypto/rand` → 32 bits of entropy, so a collision between two concurrent runs of the same issue + agent is ~1 in 4 billion.\n- The suffix is lowercase hex, so the full name stays valid against Docker's name regex (`^[a-zA-Z0-9][a-zA-Z0-9_.-]*$`).\n- If `crypto/rand` ever fails (effectively impossible), it falls back to a time-based suffix rather than failing the run over a name.\n- The **branch** name (`issue-<n>-<agent>`) is intentionally unchanged — it must stay stable so an agent can re-push to the same branch.\n\n## Tests\n\nNew `internal/agentrun/docker_test.go` (pure unit test, no Docker daemon needed):\n\n- 1000 generated names all keep the `zoo-issue-78-greg-` prefix, carry an 8-char lowercase-hex suffix, match Docker's name regex, and are pairwise unique.\n- Different issues/agents stay distinguishable in the name.\n\n`go build ./...`, `go vet ./...`, and `go test ./...` all pass.\n\nCloses #78","head":"issue-78-greg","title":"Make agent container names unique per run"}
Arguments
{"base":"main","body":"## Problem\n\nAgent container names were `zoo-issue-<n>-<agent>` — deterministic per issue + agent. When two runs of the same issue by the same agent overlapped (e.g. an `issue:assigned` event and a comment event on the same issue, or a re-run before the previous container was torn down), the second `ContainerCreate` failed with a name collision.\n\n## Change\n\nKept the readable prefix (which makes it easy to spot which issue/agent a container belongs to, as requested in the issue) and appended a short random hex suffix:\n\n```\nzoo-issue-78-greg-a1b2c3d4\n```\n\n- `containerName(issue, agent)` in `internal/agentrun/docker.go` draws 4 bytes from `crypto/rand` → 32 bits of entropy, so a collision between two concurrent runs of the same issue + agent is ~1 in 4 billion.\n- The suffix is lowercase hex, so the full name stays valid against Docker's name regex (`^[a-zA-Z0-9][a-zA-Z0-9_.-]*$`).\n- If `crypto/rand` ever fails (effectively impossible), it falls back to a time-based suffix rather than failing the run over a name.\n- The **branch** name (`issue-<n>-<agent>`) is intentionally unchanged — it must stay stable so an agent can re-push to the same branch.\n\n## Tests\n\nNew `internal/agentrun/docker_test.go` (pure unit test, no Docker daemon needed):\n\n- 1000 generated names all keep the `zoo-issue-78-greg-` prefix, carry an 8-char lowercase-hex suffix, match Docker's name regex, and are pairwise unique.\n- Different issues/agents stay distinguishable in the name.\n\n`go build ./...`, `go vet ./...`, and `go test ./...` all pass.\n\nCloses #78","head":"issue-78-greg","title":"Make agent container names unique per run"}
Result
Pull request opened
Thinking
The PR has been opened. Next, I'll leave a comment on the issue summarizing what was done.
Finally, report back on the issue:
Tool 🔧 comment {"body":"Hi @abrander,\n\nGood catch — the name was fully deterministic (`zoo-issue-<n>-<agent>`), so any two overlapping runs of the same issue by the same agent (e.g. an assign event plus a comment event on the same issue) would collide on container creation.\n\nI've opened a PR that keeps the prefix you like and appends a short random hex suffix:\n\n```\nzoo-issue-78-greg-a1b2c3d4\n```\n\n- 8 hex chars from `crypto/rand` (32 bits) → collisions between concurrent runs of the same issue + agent are ~1 in 4 billion, while the name stays short and greppable.\n- The suffix is lowercase hex, so the name stays valid against Docker's name regex.\n- The **branch** name (`issue-<n>-<agent>`) is intentionally left alone — it must stay stable so an agent can re-push to the same branch.\n\nUnit tests cover the prefix, suffix format, Docker name validity, and uniqueness across 1000 generated names. `go build`, `go vet`, and `go test ./...` all pass."}
Arguments
{"body":"Hi @abrander,\n\nGood catch — the name was fully deterministic (`zoo-issue-<n>-<agent>`), so any two overlapping runs of the same issue by the same agent (e.g. an assign event plus a comment event on the same issue) would collide on container creation.\n\nI've opened a PR that keeps the prefix you like and appends a short random hex suffix:\n\n```\nzoo-issue-78-greg-a1b2c3d4\n```\n\n- 8 hex chars from `crypto/rand` (32 bits) → collisions between concurrent runs of the same issue + agent are ~1 in 4 billion, while the name stays short and greppable.\n- The suffix is lowercase hex, so the name stays valid against Docker's name regex.\n- The **branch** name (`issue-<n>-<agent>`) is intentionally left alone — it must stay stable so an agent can re-push to the same branch.\n\nUnit tests cover the prefix, suffix format, Docker name validity, and uniqueness across 1000 generated names. `go build`, `go vet`, and `go test ./...` all pass."}
Result
Comment posted
Thinking
Everything is complete:
1. ✅ Investigated the codebase and identified the container name generation site (run.go:204)
2. ✅ Implemented `containerName()` in docker.go, appending an 8-character random hex suffix to the existing prefix
3. ✅ Updated run.go to use this
4. ✅ Added unit tests (docker_test.go)
5. ✅ gofmt clean, go vet clean, build successful, all tests passing
6. ✅ Committed and pushed to issue-78-greg
7. ✅ Opened a PR referencing "Closes #78"
8. ✅ Commented on the issue
The PR is awaiting review. I shouldn't merge it without an approval review from someone other than the author. Done.
Done. Summary of what I did for issue #78 (Container names):
**Root cause:** The container name was fully deterministic — `zoo-issue-<n>-<agent>` — so any two overlapping runs of the same issue by the same agent (e.g. an `issue:assigned` event plus a comment event on the same issue, or a re-run before the previous container was torn down) collided on `ContainerCreate`.
**Fix (PR opened from `issue-78-greg`):**
- New `containerName(issue, agent)` helper in `internal/agentrun/docker.go` that keeps the human-readable `zoo-issue-<n>-<agent>` prefix (as the issue author wanted) and appends an 8-char lowercase-hex suffix from `crypto/rand` — 32 bits of entropy, so collisions are ~1 in 4 billion while the name stays short and greppable, and valid against Docker's name regex.
- `run.go` now uses the helper; the **branch** name is intentionally unchanged since it must stay stable for re-pushes.
- New unit test (`docker_test.go`, no Docker daemon needed) verifying the prefix, 8-hex-char suffix, Docker name validity, and uniqueness across 1000 generated names.
**Verification:** `gofmt` clean on touched files, `go vet`, `go build ./...`, and `go test ./...` all pass.
The PR is open with a `Closes #78` reference and is ready for review — I'll merge it once it has an approval.