Bb CLI

bb CLI

Use bb when controlling bb itself: inspect current context, coordinate threads, message agents, or inspect projects, providers, and environments.

Start With Context

• Use bb status to identify the current project, thread, and environment.
• Prefer --json when command output will drive follow-up work.
• Run bb guide for the system overview and bb guide <chapter> for full command reference.
• A standalone bb CLI with no connection env targets the default local server at http://127.0.0.1:38886 and host daemon port 38887. Set BB_SERVER_URL and BB_HOST_DAEMON_PORT only for remote or non-default targets. The Add machine installer injects its enrolled daemon's selected local API port automatically and atomically reserves it across default and custom machine data directories.
• The main server and source Vite app bind to loopback by default. Use bb connect or a private Tailscale Serve URL for remote browsers and execution machines. --server-bind-host 0.0.0.0 is a compatibility escape hatch only: the public API is unauthenticated and permits command execution and file reads, so wildcard binding requires a trusted network boundary. The startup listener and app rows then show http://0.0.0.0:<port>; health checks and the colocated daemon still use loopback. This opt-in is IPv4-only. Containers must also publish the port to the host.

Environment Setup Script

• To make a repo work with bb worktrees, run bb guide environments. It documents the repo-level .bb-env-setup.sh setup hook and the .worktreeinclude file.
• A new worktree checks out tracked files only. Commit a .worktreeinclude file at the repo root to list untracked files, such as .env, that bb must copy from the source checkout. It uses gitignore pattern syntax. bb copies the matches before it runs .bb-env-setup.sh.

Remote Client

• bb-app client ssh-target set <server-origin> <ssh-target> configures the local helper to open files from a remote bb server in local editors. The SSH target is the value that works after ssh, such as devbox or user@devbox.
• These mappings live on the client machine in <dataDir>/client.json; the CLI resolves the server's host ID when writing the mapping, and the remote server does not read the file.
• Use bb-app client ssh-target list --json to inspect mappings.

App Settings

• BB_INFERENCE selects the shared model for server-side helper completions, including thread titles and commit subjects. It defaults to codex/gpt-5.6-luna; set an override with bb-app config set BB_INFERENCE <provider/model>.
• BB_INFERENCE_FALLBACK selects the helper model used after a transient primary timeout, rate limit, or service-unavailable failure. It defaults to codex/gpt-5.4-mini; set it with bb-app config set BB_INFERENCE_FALLBACK <provider/model>.
• BB_TRANSCRIPTION selects the voice transcription model. It defaults to codex/gpt-transcribe; set an override with bb-app config set BB_TRANSCRIPTION <provider/model>.
• bb-app config and bb-app env reload runtime settings in a running server, but the CLI identifies server and launcher settings that are startup-only, including binding/ports, data and the dev-app port, telemetry, inherited skill roots, and BB_FF_* flags. BB_LOG_LEVEL is also startup-only. Use bb-app config, not bb-app env, to change BB_APP_URL, BB_INFERENCE, BB_INFERENCE_FALLBACK, or BB_TRANSCRIPTION live. After a startup-only change, run bb-app stop && bb-app start or restart the desktop app. Until then, a server previously bound to 0.0.0.0 remains exposed even if BB_SERVER_BIND_HOST was changed or unset.
• Settings → General holds server-backed app-wide preferences. For details, read references/app-settings.md (in this skill's directory).
• Keep Awake is a standalone builtin plugin. Use bb keep-awake enable and bb keep-awake disable to configure its macOS idle-sleep assertion. Inspect it with bb keep-awake status [--json]. Target hosts with bb keep-awake hosts all or bb keep-awake hosts <host-id>....
• The showUnhandledProviderEvents General preference defaults to false and exposes raw provider events that bb does not yet understand in packaged builds. Development builds always show those diagnostic rows. Update it with bb settings general showUnhandledProviderEvents <true|false>.
• The steerActiveThreadOnEnter General preference defaults to false. Outside an open composer typeahead menu, enable it to make Enter steer a running thread and Command+Enter queue a follow-up; when disabled, those actions are reversed. Shift+Enter inserts a newline, while zen mode also makes unmodified Enter insert one. On coarse-pointer touch devices, the software keyboard keeps Return as a newline; iPadOS WebKit preserves the Enter shortcuts for a connected Magic Keyboard. Update the preference with bb settings general steerActiveThreadOnEnter <true|false>.
• Settings → Keyboard records server-backed per-command shortcut overrides. The showKeyboardHints preference controls the delayed badges shown while holding Command or Control and defaults to true; update it with bb settings keyboard hints <true|false>. Reset returns to bb's current default; Clear disables the command. Non-native actions apply in browser and desktop clients, and desktop menu accelerators use the same resolved bindings. For details, read references/app-settings.md.
• Use bb settings show, bb settings general, bb settings experiment, bb settings keyboard, bb settings usage, and bb settings version to inspect or change these server-backed values from agents. Pass bb settings usage --machine <id-or-name> to read provider limits from a specific connected machine instead of the primary machine.
• Extensions provides the unified Skills and Plugins management UI, while Automations stays in the Plugins section beside threads.
• The default-off newOnboarding experiment exposes the first-run agent and project setup guide. Change it with bb settings experiment newOnboarding <true|false>. Use bb settings replay-onboarding to enable it and show the guide again.
• The default-on editMessages experiment allows accepted root user messages in Codex, Claude Code, and Pi threads to be replaced and rerun, including failed or incomplete turns. Submitting an edit to a running thread stops and settles the current turn first. Change it with: bb settings experiment editMessages <true|false>.
• Thread timeline windows are capped by event count as well as by user-message count (BB_FF_TIMELINE_WINDOW_EVENT_BUDGET, default 1500), because a thread with few user messages but many events would otherwise reproject its whole history on every timeline request, blocking the server event loop and delaying the daemon endpoints the agent awaits between tool calls. A turn still running is cut at the budget as well, so a very long turn costs the budget per update rather than growing without limit; a finished turn is rendered whole. Older activity loads automatically as you scroll toward the top; nothing becomes unreachable.

Agent Instructions

• Add AGENTS.md to the bb data dir (usually ~/.bb/AGENTS.md) to inject user-level default instructions for every provider-backed thread across all projects.
• Add .bb/AGENTS.md at a workspace root to inject repo-specific instructions into every thread that runs there. Track the workspace file with git so fresh managed worktrees include it.
• bb appends data-dir instructions first, then workspace instructions, to the thread system prompt for all providers when a provider session starts.
• Only the plural AGENTS.md is read, only from those exact locations (no parent-directory walk); an empty file is ignored. Run bb guide agent-configuration for details (it also covers project .bb/skills/).

Skills

• Use bb skill list to inspect installed and discovered skills. It defaults to BB_PROJECT_ID, then the personal project; pass --project or --environment to select another workspace.
• Copy the opaque ID from bb skill list, then use bb skill show <skill-id> or bb skill files <skill-id> to read that exact skill.
• bb skill show <skill-id> --json returns the revision. Pass that revision, plus --file, to bb skill update <skill-id>. Use update or delete only when the list says editable.
• Use bb skill search [query] for live skills.sh results. With no query it lists what is trending; ranking in the response says which leaderboard you got. Install counts match the Skills browse page — lifetime totals, resolved per skill on the trending ranking, where the leaderboard's own number counts only a 24h window. Resolution is capped at 48 rows per page and a detail page can fail to fetch, so read the two surfaces differently: the INSTALLS column prints — for a row it could not resolve, while --json lists those ids in unresolvedInstallIds and leaves their installs holding the 24h figure. Every other row's installs is the lifetime total. Use --per-page 48 or less to avoid unresolved rows. Inspect metadata and the bounded file preview with bb skill registry detail <registry-skill-id>. Install with bb skill install <registry-skill-id>; never infer an install source from a display name.
• bb skill install-cli-skills copies bb's built-in CLI skills into a machine's global agent skill roots (~/.agents/skills and ~/.claude/skills) so agents outside bb can drive bb. It targets every connected machine unless you pass the repeatable --machine <id-or-name>, and reports each machine's outcome. Settings → Skills has the same action; it confirms first, and asks which machines only when more than one is enrolled.
• bb skill cli-skills-status reports per machine whether the installed copy is installed, outdated, missing, or unknown (disconnected or unreachable).

Spawning Threads

• Use bb thread spawn --project <project-id> --prompt "..." to create another thread. Pass the intended project explicitly; the CLI does not infer it from context variables. Omitted execution flags use remembered project defaults; without a remembered model, bb uses the explicitly requested provider or Codex and resolves its provider-reported default model on the target machine.
• After spawn: do not bb thread open, split, or focus the new thread unless the user asks. Just launch and report the thread id.
• Add repeatable --file <path> / --image <path> flags for structured prompt attachments, and --section <id> to add the new thread to a section. These flags pass host-readable absolute paths (or relative server-upload tokens) through to the runtime; they do not read files on the CLI machine.
• Spawn creates a root thread unless you pass --parent-thread.
• Use bb thread fork <source-thread-id> to clone a provider session. It creates an idle fork by default; add --prompt, select --workspace isolated|reuse, or anchor with --source-seq-end. Permission mode inherits the source thread unless explicitly overridden.
• Pass --visibility hidden for background/plugin workers that should remain out of sidebar organization without contributing unread/pending favicon attention. bb thread list excludes them by default; pass --include-hidden when a hidden worker must be discovered. Direct-ID lifecycle and messaging operations remain available. A root thread is visible by default; a child thread inherits its parent's visibility, so a hidden thread's subagents are hidden too. Pass --visibility to override the inherited value. A hidden child still reports its turns and blockers to its parent thread; only forks and side chats stay silent. Promote or hide an existing thread with bb thread update <id> --visibility visible|hidden.
• Stop a finished hidden worker with bb thread stop <id> to release its agent runtime promptly. Archive it first when it no longer belongs in active thread lists. Stop preserves the thread and supports a later resume.
• bb connect --code <code> --server https://<handle>.getbb.app pairs this bb server for browser access at <handle>.getbb.app (get the code from https://getbb.app). Pairing returns immediately — the server itself holds the tunnel and reconnects on restart, so there is no foreground process. In a source checkout, pnpm dev automatically sets BB_DEV_CONNECT_BASE_URL to the worktree's local Cloud origin. Connect uses it only as the unpaired default; explicit --server and --base-url values still win, including when pairing the dev bb with getbb.app. bb connect status / bb connect off report and clear the pairing. Port sharing works from a thread on any enrolled host. `bb connect expose

resolves that thread's environment host and returns its public URL; outside a thread it defaults to the server host. Pass--host to override expose, unexpose, or shares. Server-host URLs use the server label; machine-host URLs use the machine label and proxy directly through its daemon. Shares are owner-session-gated, not public. bb connect statusshows every share's host and URL;shares --jsonincludes the resolved host plushostId, hostName, port, and urlper row. bb connect serverslists every bb on the paired account (handle, name, url, live) so callers can discover siblings;--jsonincludes selfHandlefor deduping this server. When you start a local server the user should open remotely, expose the port and give them the share URL. Remote access is owned by the builtinconnectplugin:bb plugin disable connect cuts it off entirely; with bb connect still enabled,bb plugin enable connect` restores the command. Plugins → Connect shows the current URL, QR code, shared ports, re-pair form, and disconnect control.

• Add remote execution machines from Settings → Machines. Its one-line installer stores the bb connect machine credential locally and configures both the daemon protocol and agent-launched bb CLI to traverse the account gate; revoke a lost machine from the getbb.app dashboard. The installer uses the server's exact /install/bb-app.tgz artifact and uses the npm registry only on a 404. It installs under the enrollment's bb data directory, without sudo or a global npm configuration, and enables daemon --auto-update. Newer protocol mismatches update that private install with a persisted exponential retry backoff from 5 seconds to 5 minutes, then let launchd/systemd restart the daemon. Auto-update never downgrades. To bypass a transient backoff, use bb machine retry-update <id-or-name>. Remove --auto-update from the service definition and reload it to opt out.
• Run bb machine list to see machine names, IDs, connection status, and last seen time (--json returns the raw host list). Use --machine <id-or-name> (alias --host) on bb thread spawn to run in a personal or unmanaged workspace, or combine it with --new-environment worktree. Do not combine a machine selector with an existing environment ID, which already owns its machine.
• Each machine carries a permission limit (maxPermissionMode, default full): the highest permission mode a thread on that machine may run with. The server resolves any higher request down to it, and refuses a provider that supports no mode under it. Only the owner can change it, on the machine page at Settings → Machines → the machine — there is no CLI, SDK, or API surface that sets it, and machine credentials are refused — so read it from bb machine list --json or bb machine show and ask the user to change it in the app.
• bb machine show, join-code, rename, retry-update, and remove cover the Settings → Machines lifecycle. Use bb machine provider-cli status|install to inspect or install provider CLIs on a selected machine.
• bb updates (alias for bb updates status) aggregates bb-app and provider CLI update state across every machine — the CLI counterpart of Settings → Updates. bb updates apply [--machine <id-or-name>] runs every available provider CLI install/update sequentially; update bb-app itself with the printed upgrade command or the desktop relaunch.
• Use bb project create --name <name> --root <path> --machine <id-or-name> to bind a new project's local path to a connected enrolled machine. Use --host as an alias. Omitting both selectors preserves the existing local CLI machine fallback (normally the primary machine).
• bb project list preserves the ordinary-project-only default. Pass --include-personal when the singleton personal project must be discoverable.
• Use bb project source add <project-id> --machine <id-or-name> --path <path> to register a path on another connected machine. It uses the same selector resolution and fallback as project create. Use --clone instead of --path to clone the project's remote there; --remote-url and --target-path are optional clone overrides.
• bb project paths|files|content|commands accept --machine <id-or-name> (--host alias) or --environment <id>, but not both. An environment uses its owning machine and workspace; an explicit machine uses that machine's project source; omitting both intentionally uses the primary machine source. bb project content --json returns UTF-8 text or base64 binary content with an explicit contentEncoding.
• Use bb project attachment upload <project-id> --client-file <path> when the bytes live on the CLI machine, including when the CLI and bb server are on different hosts. It reads locally and sends multipart bytes through the configured BB_SERVER_URL (and its enrolled-machine authentication proxy), returning the stable server attachment DTO. Optional --filename and --mime-type override inferred metadata. Pass the returned relative path to thread --file or --image; image MIME types are capped at 10MB and other files at 25MB. `bb project attachment download

--client-file ` writes existing attachment bytes on the CLI machine. There is no project-attachment list or per-file remove API.

• bb project history|reorder exposes project prompt recall and sidebar order.
• Direct environment inspection accepts any environment ID: use bb environment status|branches|paths|diff|diff-files|diff-file|diff-patch <id> and bb environment pull-request show <id>. Diff commands require an explicit target and the matching merge-base or commit flags; all support --json.
• bb environment pull-request ready|draft|merge manages pull-request state; bb environment archive-threads bulk-archives an environment's threads.
• Spawned child threads inherit permission from explicit flags, then the parent thread's last execution, then project defaults. The parent's mode is a hard ceiling: an explicit flag can lower it but never exceed it.
• Public permission modes are accept-edits, auto, and full. accept-edits keeps workspace sandboxing and asks the user to review escalations. auto keeps the same workspace sandbox while using the provider's automatic reviewer. full explicitly bypasses sandbox and approval protections. Plan mode remains separate. The product default is auto when no inherited or project default applies.
• Subagents inherit the parent's permission mode by default; --permission-mode full only takes effect when the parent itself runs full.
• Use --parent-self inside a thread to parent the new thread to the current thread.
• Use --parent-thread <thread-id> to choose another specific parent.
• A parent can live in a different project. Pass --project <other-id> with --parent-self to delegate work in another repository; the child still reports back to its parent and stays under its parent's permission ceiling.
• If provider or model choice matters, inspect options with bb provider list and bb provider models <provider-id>. Both accept --machine <id-or-name> (alias --host) or --environment <id> to inspect the machine where work will run; the selectors cannot be combined. With neither selector they intentionally inspect the primary machine.
• Known ACP agents can appear automatically when their CLI is installed on the host; for example opencode, omp, Grok Build's grok CLI, or Hermes' hermes CLI on PATH appears as provider acp-opencode, acp-omp, acp-grok, or acp-hermes-agent.
• Cursor ACP threads discover project skills from .cursor/skills. This root can link to .agents/skills. bb skill list shows linked Cursor skills under cursor-project and keeps them read-only.
• Custom ACP agents can be registered in the app data-dir config.json under customAcpAgents. The user supplies a slug id; bb exposes it as provider id acp-<id>. Custom config wins if it uses the same provider id as a known ACP agent, so overriding acp-opencode uses "id": "opencode". This list has no set/unset CLI surface, so edit the JSON and run bb-app config refresh or restart bb. The configured command is local code execution and only works with a co-located daemon. Optional logo accepts an SVG, PNG, or WebP path; relative paths resolve from the bb data dir. Custom ACP agents can use modelCli for CLI model listing/selection, reasoningCli for launch-time reasoning flags, and nativeReasoning for ACP session/set_config_option reasoning. Optional nativeSkillRoots.user paths resolve from the target host home directory. Optional nativeSkillRoots.project paths resolve from the selected workspace. The composer lists skills from these roots.
• Top-level customModels in the same config.json registers extra picker models. providerId accepts a built-in provider id or any acp-* provider id. The provider must still accept the id: claude-code and codex accept unlisted ids, while an ACP agent can reject an unknown id at session start. OpenCode rejects unlisted ids; add the model to the OpenCode config instead and bb discovers it automatically. An OpenCode agent is a session mode, not a model, and cannot be selected through bb. This list also has no set/unset CLI surface; edit the JSON and run bb-app config refresh or restart bb.
• Top-level sharedSkillRoots uses the same relative user and project paths. bb lists these skills as read-only. bb injects them into each provider, so one physical skill collection can support bb and standalone provider CLIs.

Give spawned threads clear prompts: objective, constraints, expected deliverable, validation to perform, and what to report back. Ask for outcome, changed files or artifacts, validation performed, and blockers.

Coordinating Work

• Use one clear owner per task.
• Spawn independent tasks separately when parallel work is useful.
• Let threads work after spawning. Do not poll with shell sleeps, repeated log reads, or repeated status reads.
• Use bb thread wait <thread-id> when you explicitly need to block until a thread finishes. It defaults to waiting for idle for up to 20 minutes; pass --status or --event for a different target, and `--timeout

` when you need a shorter or longer budget.

• Use bb thread tell <thread-id> "..." when requirements change, a blocker needs clarification, or follow-up work is needed.
• Use bb thread edit-message <thread-id> --message "..." to replace and rerun the latest eligible user message in a Codex, Claude Code, or Pi thread. Pass --expected-request-sequence <sequence> to select an earlier message. Failed and incomplete turns are eligible; submitting against a running thread stops and settles its current turn first. Opening edit mode in the app is non-destructive; history changes only when the edit is submitted successfully, and workspace changes remain. When an agent edits another thread, the CLI carries its BB_THREAD_ID so the replacement runs under agent permission policy.
• bb thread tell steers by default, delivering the message immediately into the active turn. Use --mode queue when the message is non-urgent and the agent can finish its current work first. Steer is especially important for a wrong direction, hard stop, or critical clarification. Example: bb thread tell <thread-id> "Stop and use approach B" --mode steer.

Inspecting Results

• Use bb thread search, history, read|unread, and section for the same organization and recall features as the sidebar. bb thread queue exposes queued-message list/create/update/send/reorder/group/delete operations. Queue updates use the listed message version to prevent overwriting a concurrent edit and accept repeatable --file and --image attachment options.
• Use bb thread show <thread-id> for status, parent, environment, pull request status, and result.
• Use bb thread show <thread-id> --git-diff to review file changes.
• Use bb thread log <thread-id> to inspect the conversation.
• Use bb thread output <thread-id> to read the latest final output, or bb thread output --self for the current thread.

For review or fix pipelines, get the environment ID from bb thread show <thread-id> --json, then spawn the follow-up with --environment <environment-id> so it sees the same files.

Opening Threads And Files In The App

• Use bb thread open <path> inside a BB thread to open a Markdown, HTML, or other workspace file for the user in the BB IDE's thread panel.
• Use bb thread open <thread-id> --split right|down|left|top|replace to open or focus a thread in the current app split layout. replace is the default; an already-open thread is focused. Edge splits create panes through the eighth pane; at eight panes, they replace the focused pane.
• A file path is optional when a thread ID is explicit: bb thread open <thread-id> [path] [--split <placement>].
• Paths can be thread-relative workspace paths, or absolute paths inside the target thread workspace.
• Absolute paths under BB_THREAD_STORAGE open as thread-storage files for the current thread.
• Use bb thread pane maximize|restore|toggle [thread-id] to change a matching already-open pane in every connected BB app window. Inside a BB thread, omit the id to use BB_THREAD_ID. The command reports how many connected clients received the ephemeral action. The SDK equivalent is sdk.threads.paneAction({ threadId, action }).
• Users can also toggle the focused pane from its header or with the configurable pane.maximize.toggle app command (default Mod+Shift+E).

Files And Voice

• Use bb file read|write|list|paths|mkdir|move|remove for SDK-equivalent host file access. --host targets another machine; --root confines mutations.
• Use bb voice transcribe <file> to invoke the configured voice transcription service without the app composer.

Long-Running Commands

• Use bb terminal ... for long-running commands the user may need to inspect or stop later: dev servers, watch tasks, REPLs, database consoles, and similar processes. The terminal is a real persistent PTY shown in the bb UI.
• list and create require exactly one explicit scope: --thread <id>, --environment <id>, or --machine <id-or-name> (--host is an alias). Add --cwd <path> only to a machine scope. Machine targets resolve to an explicit host ID; terminal commands never silently fall back to primary.
• Start a server with bb terminal create --thread <thread-id> --title "pnpm dev" --command "pnpm dev".
• All existing-session operations need only the terminal ID. Use bb terminal wait <terminal-id> --contains "Local:" --timeout 120 to wait for readiness from new output. Pass --from-start only when matching existing scrollback is intentional.
• Use bb terminal output <terminal-id> --json to read bounded output, then continue with --since-seq <nextSeq> when polling. Use bb terminal send <terminal-id> --text "..." --enter for interactive input, bb terminal rename <terminal-id> <title> to rename, and bb terminal close <terminal-id> when the process is no longer needed.
• bb terminal restart <terminal-id> replaces the session with a shell in the same scope, size, and title. It does not replay the original launch command.

Failures And Interruptions

• For failed threads, inspect bb thread show <id> --json and bb thread log <id> before deciding whether to retry, clarify, or update the user.
• The opt-in Provider retry plugin automatically waits for structured Codex and Claude Code subscription-window resets when the failed turn was accepted and its execution settings remain available. Prior output or tool activity does not block recovery. Enable it with bb plugin enable provider-retry or under Extensions → Plugins. Its timers last only while the current bb server/plugin process is running. Inspect it with bb provider-retry status [thread-id], or cancel one with bb provider-retry cancel <thread-id>. Automatic waits default to six hours; configure longer waits with bb plugin config provider-retry set maximumWait "24 hours" or select No limit in the plugin settings. Resets beyond the configured horizon are not scheduled. Each reported reset window is attempted automatically at most once during that process. A later failed turn that omits a fresh rate-limit update can still inherit the last blocked window.
• Use bb provider-retry retry <thread-id> for a manual provider retry when no plugin timer remains. It sends agent-only “Please continue.” on the existing provider conversation and declines when input was not accepted, execution settings are unavailable, a newer request exists, or the provider still owns the retry.
• For interrupted or stopped threads, inspect first. If the user stopped the thread, treat that as intentional unless they ask you to continue.
• Use bb thread stop <id> when a thread is stuck or no longer needed.
• bb thread stop <id> also releases an idle or stuck agent runtime. The command is idempotent and preserves thread history.
• Use bb thread compact <id> to send the built-in /compact command to an idle or errored thread. Completion or failure appears in the timeline. Codex, Claude Code, Pi, and OpenCode ACP support it; Cursor ACP does not expose compatible compaction through ACP.
• Use bb thread cancel-plan <id> to exit an active Plan turn without optimistically clearing its banner. Use bb thread clear-goal <id> to clear a Codex thread's durable active Goal. Both wait for provider confirmation.

Memory

• Memory is an opt-in official plugin bundled with the app. Install it with bb plugin install memory before using bb memory ....
• Use bb memory catalog to inspect the compact index, `bb memory search

to find candidates, andbb memory get ` to progressively disclose a full record.

• Use bb memory add --scope project ... for repository-specific knowledge. Global writes require an explicit --scope global and should be reserved for durable preferences or facts that apply across projects.
• Mutations use optimistic concurrency: pass the current record version to bb memory update <id> --expected-version <n> or bb memory forget <id> --expected-version <n> --reason <text>.

Tasks

• Tasks is an opt-in official plugin bundled with the app. Install it with bb plugin install tasks before using bb tasks ....
• Start tracked work with bb tasks show <key-or-id> --json. Fetch relevant files with bb tasks attachment get <attachment-id> --out <path>.
• Leave substantive milestone updates with bb tasks comment <key-or-id> --body <markdown> and attach result artifacts with bb tasks attachment add <key-or-comment-id> --file <path> (task key = task-level; comment ID = that comment). Avoid progress spam.
• Delegated threads are attached automatically. For work started independently, run bb tasks attach <key-or-id> from the working thread.
• When implementation is ready for review, run bb tasks update <key-or-id> --status in_review; if blocked, leave the status accurate and explain the blocker in a comment.
• Change task hierarchy with `bb tasks update --parent

or promote a subtask with--no-parent`. The flags are mutually exclusive, and both task keys and IDs are accepted.

• Add --json when command output will drive follow-up work. Run bb tasks --help for project, folder, task, label, attachment, preset, delegation, attached-thread, and demo-data commands.
• bb tasks list defaults to 100 rows and accepts --limit 1-500 plus the opaque --cursor returned as nextCursor in JSON (or printed after a human page). Keep the same filters and sort. A task-list mutation makes the cursor stale; restart without it.

Docs

• Docs is an opt-in official plugin. Keep read-only discovery small with bb docs vaults, list, and read.
• Edit through a sync workspace: bb docs pull <path> --into <dir> for one file, add --folder for a subtree, or use bb docs pull --all. Edit the resulting ordinary files, inspect bb docs status <dir> --diff, then run bb docs push <dir>.
• .bb-docs-state.json is versioned identity/concurrency state; do not edit it. Concurrent local and remote changes fail closed with exit 3. Pull and merge, then retry.
• Local deletions are ignored unless push --delete is explicit. Use push --dry-run --diff before destructive mirroring. Standalone callers can select the local workspace machine with --workspace-host <id>.
• Direct write, mkdir, move, and remove commands are deprecated and retained temporarily for compatibility. Agents should use pull/edit/push.

Automations

• Use bb automation ... to manage scheduled tasks. This command is provided by the builtin automations plugin. When due, an automation runs in one of two modes: agent (spawns a thread running a prompt — uses tokens) or script (runs a stored command and captures stdout/exit — no agent, no tokens).
• Choosing a mode: pick script when the output is fully determined by code (watchdogs, threshold alerts, health checks, pollers with a fixed output) — write the check so it prints nothing when there's nothing to report, so quiet ticks stay silent. Pick agent when the run needs reasoning (summarize, triage, draft for a human, branch on content).
• For a "watch X and alert me when Y" request, prefer a script automation: author the check script (inline --script or a file via --script-file) so its stdout IS the alert, then create it — no model spend per tick.
• Script automations may be disabled by the plugin setting; fall back to an agent automation if script creation is rejected.
• Create an agent automation with bb automation create --project <id> --name "..." --cron "0 9 * * 1-5" --timezone "America/New_York" --provider <id> --model <model> --prompt "...".
• Create a one-shot agent automation with bb automation create --project <id> --name "..." --in "30m" --provider <id> --model <model> --prompt "...", or use --at "2026-07-03T09:00:00-07:00" for an absolute run time.
• Create a script automation with bb automation create --project <id> --name "..." --cron "..." --timezone "..." --script-file ./watch.sh (or --script "<inline>"). A script that exits 0 with empty stdout, or whose last non-empty line is {"wakeAgent": false}, stays silent.
• --script-file reads the file relative to your cwd from the thread's environment host (the server host outside a thread; --host <name-or-id> overrides) and stores a private copy that runs execute. The copy is a snapshot: edits to the source file do nothing until you run bb automation update <id> --project <id> --script-file <path> again with the same script flags; create and update print that exact command. create, update, and show print the stored copy path on the Script: line (execution.storedScriptPath in --json).
• Script automations run on the server with cwd set to the plugin data directory. They have no environment/workspace. Injected variables are BB_SERVER_URL, BB_PROJECT_ID, BB_AUTOMATION_ID, and BB_AUTOMATION_RUN_ID.
• A script run's status IS its exit code: exit 0 = succeeded; a non-zero exit is recorded as failed even if the script already produced a visible side effect (e.g. posted a message via bb thread tell). Make scripts exit 0 on success and check the exit status of each bb call. Captured stdout+stderr is stored on failed runs (see --output <run-id>).
• Cron accepts standard 5-field expressions, including step values like * * * * *, */2 * * * *, and */5 * * * *. Cron granularity is one minute. One-shot automations use --at or --in and fire once.
• Pass --project <id> explicitly for every automation command.
• Use bb automation list, bb automation show <id>, and bb automation runs <id> to inspect; --output <run-id> prints a script run's captured stdout.
• Partially update an existing agent automation in place by omitting --provider and --model and using bb automation update <id> --project <id> --prompt "...", --permission-mode accept-edits|auto|full, or exactly one target option: --target-thread <id>, --environment <id-or-path>, or --new-environment worktree [--base-branch <branch>]. Omitted execution fields are preserved; target options are mutually exclusive.
• Use bb automation pause <id> / bb automation resume <id> to toggle, bb automation run <id> to trigger now, and bb automation delete <id> --yes to remove.
• Use bb automation update <id> --project <id> with --name or schedule flags for metadata changes. To change what runs, provide a complete replacement execution: --prompt + --provider + --model for an agent, or --script/--script-file for a script. Script replacements also accept --interpreter, --timeout, and --env-json '{"KEY":"value"}'.
• Use bb plugin list if bb automation ... is unavailable; the builtin automations plugin should be installed and running.

Secrets

• Use bb secret request <NAME...> --write-env <path> when credentials are needed. Batch known names and add --purpose <text> plus one --describe <NAME> <text> per variable.
• The user enters values in a secure plugin form; values are written directly to the dotenv file and never returned in CLI output or chat. Relative paths resolve from the CLI working directory; absolute paths may point anywhere on the thread's host.
• Treat the returned path and added/updated/unchanged counts as verification. Do not inspect the completed file with cat, sed, env, or similar tools.

Ask User Question

• The builtin ask-user-question plugin gives providers that lack a native one an AskUserQuestion tool — multiple-choice questions answered in a composer form. It is disabled on fresh installations; enable it under Extensions → Plugins or with bb plugin enable ask-user-question.
• It contributes no CLI command. Once enabled the tool appears in the agent's own tool list, and only for providers without a native equivalent: Claude Code threads keep using Claude's built-in AskUserQuestion, so the plugin withholds its copy there.
• Answering is UI-only. bb thread interactions list <thread-id> shows the request as kind plugin, but bb thread interactions answer resolves provider questions only, so a pending plugin question cannot be answered from the CLI.

Workflows

• The builtin

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