barony 0.5.1

Git-native governance for teams of AI coding agents — the baron CLI over Barony's markdown/git collab substrate.

barony — git-native governance for teams of AI coding agents

Install barony, run baron, import baron. Part of Barony — github.com/vggg/barony — where the full framework, concepts, and adapters live. This page is the CLI reference.

baron is Barony's CLI. It turns the multi-agent coordination conventions that Barony emits into mechanisms: a small CLI that scaffolds new projects (baron init), validates the canonical specs, reports clone/branch/ledger divergence, and performs the race-prone record-keeping operations (finding/decision numbering, handoff lifecycle) safely.

Design principle (ADR-003, ../docs/adr/ADR-003-baron-cli.md): the markdown/git substrate IS the database. baron is a disciplined reader/writer over the same human-legible collab-repo files the personas use (manifest.yaml, persona.yaml, findings/index.md, decisions/index.md, _handoff/*.md, wiki/status.md). It never introduces another store, and every file it writes remains fully human/agent-legible.

Dependencies: typer + pyyaml only. git is driven via subprocess. gh is an accepted prerequisite for forge features only (baron lock) — everything else below works without gh installed. The pydantic-ai runtime adapter is an optional extra (barony[pydantic-ai], pinned) — see baron hydrate below.

Install

Once published to PyPI (distribution name barony):

uv tool install barony           # installs the `baron` console script
# or:
pip install barony

Until then, install from a local clone:

# from the repo root, with uv:
uv tool install ./cli            # installs the `baron` console script
uv tool install './cli[pydantic-ai]'   # + the pydantic-ai runtime adapter
# or for development:
uv run --project cli baron --help
# or with plain pip (>= 3.10):
pip install ./cli

Quickstart

Verified end-to-end on a bare venv (pip install the wheel, no repo checkout):

baron init gardenkit --dir gardenkit-collab --code-repo ./gardenkit \
  --personas dev:fern,dev:moss,librarian:iris
cd gardenkit-collab
baron validate .          # 0 errors
baron status              # green when fresh
baron finding new --title "First finding" --author fern --no-push
HANDOFF=$(baron handoff create --for moss --from fern --title "Review the seam")
baron handoff close "$HANDOFF" --note "Done, see F1."
baron index               # regenerates _handoff/README.md — commit it
baron worktree add fern   # ../gardenkit-worktrees/fern, branch persona/fern

Commands

baron init <project-name> (ADR-006)

The deterministic, non-conversational scaffold — the mechanical subset of the skill's ORCHESTRATE.md recipe.

baron init gardenkit --dir gardenkit-collab --code-repo ./gardenkit \
  --personas dev:fern,dev:moss,librarian:iris --runtime claude

Flags: --dir (default ./<project-name>), --code-repo (local path or git URL, recorded in manifest.yaml with a relative path + workspace.worktrees_root), --personas archetype:slug,... (archetypes: dev, librarian, autonomous-event, autonomous-cron, reviewer, merger; a librarian is appended when missing), --runtime claude|generic|pydantic-ai|code-puppy, --no-git. Refuses a non-empty target directory.

Emits the canonical layout — CONVENTIONS.md/COORDINATION.md (filled), manifest.yaml, canon/ + adapters/ copied verbatim from the packaged templates (vendored from skills/barony/assets/collab-repo/ per ADR-006; drift-guarded byte-for-byte by tests/test_template_sync.py), hydrated agents/<slug>/persona.yaml (identity <slug>@<project>.local, commit prefix, routing label; generic edit-me scope), a genesis handoff, findings/index.md + decisions/index.md ledger headers, the wiki stub, the lock-guard CI template, and a per-persona runtime kit under agents/<slug>/runtime/:

--runtime	Kit contents
claude (default)	Tier-2 persona CLAUDE.md + .claude/settings.json wiring the baron guard PreToolUse hook
generic, code-puppy	Tier-1 AGENTS.md (instruction-only; code-puppy's documented fallback)
pydantic-ai	agent_setup.py bootstrap (running it needs barony[pydantic-ai])

The scaffold must pass baron validate with zero errors before init reports success; then git init -b main + a first commit of exactly the files written (never git add -A), unless --no-git. Dates come from the injectable clock. Persona scope prose, AGENT.md manuals, and Tier-3 hydration (Claude subagents, code-puppy JSON agents) stay on the conversational path — init prints the pointers instead of pretending.

baron validate [PATH] (M1)

Validate persona.yaml / manifest.yaml — a single file, or every one discovered under PATH. Schemas are declarative Python data (src/baron/schemas.py) formalized from the prose specs in ../skills/barony/references/; the FROZEN 10-verb capability vocabulary is embedded and drift-guarded by a test that re-parses capability-vocab.v1.md.

Checks: YAML parse, missing/unknown fields, types, verbs outside the vocabulary, allow/deny overlap (including write_path scope overlap), unfilled {{PLACEHOLDER}} tokens.

Template rule: directory discovery skips files whose path contains a template marker directory (assets/collab-repo/ or legacy/) — emit-time templates legitimately carry placeholders and often aren't valid YAML at all. Fixture paths (tests/examples/) are validated but exempt from the placeholder check only. An explicitly named file is always validated.

Exit 0 = no errors (warnings allowed) / 1 = errors. --json for machines.

baron validate tests/examples/tess/persona.yaml
baron validate . --json

baron status [--fetch] [--sla N] [--json] (M2)

Run from a collab repo (or --collab PATH). Reads manifest.yaml — including the optional workspace.clones / workspace.worktrees_root fields (see ../skills/barony/references/manifest.schema.md) — and reports, with severity:

Check	Severity	Meaning
ahead	red	commits never pushed to origin (stranded work)
behind	red	origin commits never pulled (stale canonical clone)
unmerged-branch	red	local branch not merged to origin default, with last-commit age
handoff-overdue	red	status: open handoff older than the SLA (default 14 days)
dirty	warn	uncommitted paths
ledger-stale	warn	newest F/D entry date older than the newest docs//src/ commit in the code repo (heuristic, labeled as such)
wiki-stale	warn	wiki/status.md updated: older than the newest finding entry

Use --fetch to refresh each working copy's origin refs first — without it, remote-side divergence (the behind class) is invisible. Exit 0 = green (warnings allowed) / 1 = any red (CI-usable).

baron finding new / baron decision new (M3)

baron finding new --title "Tracker-gated recall" --author carson
baron decision new --title "Adopt fps-aware segmentation" --author terrence --body-file body.md

Parses the index for the max ID (both ### F<N> headings and | F<N> | table rows), allocates the next, appends a house-style entry (### F<N> — <title> (<date>, <author>)), commits, and pushes. On push rejection (someone else claimed the number first): roll back, pull --rebase, re-parse, renumber, retry — bounded (--retries, default 3). git's push atomicity is the lock; there is no other store. --no-push for offline work. Dates come from a single injectable clock (src/baron/clock.py).

baron handoff create|close|list (M3)

baron handoff create --for tess --from rex --title "Review the seam" --priority high
baron handoff close _handoff/2026-07-22-review-the-seam.md --note "Done, see F9."
baron handoff list --open

create writes _handoff/YYYY-MM-DD-<slug>.md with the standard frontmatter (created / status: open / for / from / priority). close flips status to done, adds a closed: date and an optional blockquote note, then git mvs the file to _handoff/archive/YYYY/ — archive, never delete, with history preserved. Status edits are textual so prose is never reflowed.

baron index (M3)

Regenerates a marker-delimited summary block (BEGIN/END BARON INDEX HTML comments) in _handoff/README.md (creating it if absent): open/done/archived counts plus a table of open handoffs (file, for, from, age). Also verifies finding/decision numbering: duplicates are errors (exit 1); gaps and out-of-order headings are report-only warnings — baron never renumbers history.

baron guard --persona-file <persona.yaml> (M4)

Deterministic capability enforcement as a Claude Code PreToolUse hook (ADR-004). Implements the documented hooks contract (https://code.claude.com/docs/en/hooks — the canonical target of the old docs.anthropic.com hooks URL): reads the hook JSON from stdin (tool_name, tool_input, cwd), maps the call to the frozen v1 capability verbs, and either stays silent (exit 0 — the normal permission flow applies) or blocks (exit 2 with the reason on stderr, which the contract feeds to the model). --persona-file may also come from env BARON_PERSONA_FILE.

What it decides:

• Bash — git push targeting the default branch → push_main; --force/-f/--force-with-lease/+refspec → force_push; gh pr merge → merge_pr; git merge while ON the default branch → push_main. Parsing is conservative: an undeterminable push target (e.g. bare git push outside a repo) is treated as the enforcement-relevant verb and denied for personas lacking it, with stderr naming the inference; personas holding the verb always pass. Non-git/gh commands pass — guard governs capability verbs, not general shell.
• Edit / Write / NotebookEdit — _handoff/ is universally writable; agents/<other-slug>/ needs edit_other_personas (a persona's own agents/<slug>/ dir is its own surface); denied write_path scopes always block; otherwise write_code grants the write, and without it only the persona's declared write_path scopes remain.
• Unknown tools — pass (a capability gate, not an allowlist).

Policy source (since v0.3.0): guard's rule table — the command patterns and file-op scoping semantics above, plus the conservative-deny ambiguity policy — is NOT hardcoded: it lives in the versioned artifact src/baron/data/capability-rules.v1.yaml (package data, loaded by src/baron/rules.py; rules_version: 1). It is THE single source for enforcement rules; the pydantic-ai adapter below consumes the same table, so decisions are identical across runtimes. A missing/unsupported artifact fails CLOSED. Prose contract: ../skills/barony/references/capability-rules.md.

Fail-closed but not brick: unreadable persona file / malformed stdin → DENY with actionable stderr. Escape hatch: BARON_GUARD_OVERRIDE=<reason> allows the call BUT appends timestamp/tool/target/reason to .baron/guard-override.log — a tracked file (deliberately not gitignored: overrides are visible in diffs); each override is expected to become a _handoff/. Wire-up (.claude/settings.json, matcher Bash|Edit|Write|NotebookEdit): the Claude adapter's HYDRATE.md step 3c emits it. Without baron installed the hook fails non-blocking and denials degrade to instructed — honest degradation, never a bricked session.

baron lock claim|release|list (M5)

PR-as-lock (ADR-002 §3), replacing the race-prone markdown LOCK-commit protocol — the open PR is the lock, the forge's PR list is the only state.

baron lock claim contracts/models.py --reason "tightening the stage protocol"
baron lock list
baron lock release contracts/models.py

claim creates branch lock/<slug> with one empty commit (via git commit-tree — the local checkout is never touched; the empty commit is load-bearing, GitHub refuses a PR whose head equals its base), opens a draft PR titled lock: <path> labeled lock:<path> with the reason in the body, and refuses if an open lock PR for the path exists (showing the holder). release closes the lock PR and deletes the branch. list prints path/holder/age/PR#. Requires gh (raises a clean ForgeUnavailable otherwise); all forge calls go through the Forge Protocol, so tests run against a fake. The CI side is the emitted .github/workflows/lock-guard.yml template (bash + gh), which fails any other PR touching a locked path.

baron worktree add|list|remove (M6 tooling)

The branch-per-persona worktree topology (ADR-003 §2.7): one shared object store, worktrees under the manifest's workspace.worktrees_root.

baron worktree add fern --collab .        # <worktrees_root>/fern on branch persona/fern
baron worktree add fern --repo ../code --root ../worktrees   # explicit paths
baron worktree list
baron worktree remove fern [--force]

add creates <root>/<persona> on branch persona/<persona> (created from the default branch if missing; an existing branch is reused). Defaults resolve from the manifest (workspace.worktrees_root, repos[role=code]); --root / --repo override. list shows each worktree's branch with ahead/behind vs the default branch. remove refuses while the worktree is dirty or its branch holds unmerged commits unless --force — and NEVER deletes the persona/<persona> branch (removing a working copy must not destroy history). baron status sweeps worktrees like clones (each reports its checked-out HEAD's divergence; the repo-wide branch sweep runs once, on the shared repo). Converting an existing clone-per-persona workspace: ../docs/worktree-migration.md.

baron waiver add|list + .baron-waivers.yaml

Deliberately-parked baron status reds, with mandatory expiry.

baron waiver add "clone:rex *" --reason "kept for the vNext experiment" \
  --handoff _handoff/2026-07-23-parked-branch.md --expires 2026-08-15
baron waiver list

.baron-waivers.yaml (collab root, human-legible, baron-managed via waiver add) holds {subject, reason, handoff, expires} entries; subject is an fnmatch pattern on the status SUBJECT column. A matching, unexpired waiver downgrades a red to warn with (waived: <reason>) appended — parked work stays visible, just not alarm-red. Expiry keeps waivers honest: an expired waiver stops matching (the red resurfaces) and is itself reported as an expired-waiver warn; malformed entries are reported, never silently dropped.

baron hydrate pydantic-ai --persona-file F [--out agent_setup.py]

Emit a ready-to-edit bootstrap script hydrating one persona onto pydantic-ai (the fourth runtime adapter, ../skills/barony/assets/collab-repo/adapters/pydantic-ai/HYDRATE.md).

baron hydrate pydantic-ai --persona-file agents/fern/persona.yaml --out agent_setup.py

The emitted script imports baron.runtimes.pydantic_ai.build_agent and carries a model placeholder ("test" — pydantic-ai's offline TestModel — until you pick a real model). Emission needs only baron; running it needs the optional extra:

pip install 'barony[pydantic-ai]'   # pins pydantic-ai-harness>=0.10,<0.11
                                       #      + pydantic-ai-slim>=2.14.1,<3

build_agent(persona_file, collab_root=None, model=...) returns a live pydantic_ai.Agent: instructions composed from the persona spec; harness FileSystem scoped per write verbs (natively read-only when the persona holds no write verb); harness Shell only when a shell-granting verb is allowed (with test runners denied when run_tests is denied); and an in-process guard capability (before_tool_execute + ModelRetry veto — the documented interception seam) consuming the same capability-rules.v1.yaml as baron guard, which makes the five guard-covered sub-tool denials natively enforced on this runtime. Without the extra, importing baron.runtimes.pydantic_ai raises a clean ImportError with these install instructions. Verified against pydantic-ai-harness 0.10.0 + pydantic-ai-slim 2.16.0 (2026-07-23).

Forges

src/baron/forge/ holds a small Protocol (base.py) with one built-in implementation, GitHub via gh subprocess (github.py) — first consumed by baron lock (M5: create_branch, label-aware open_pr/list_open_prs, close_pr). Other forges are plugins discovered through the baron.forges entry-point group; GitLab is backlog — design sketch in ../docs/BACKLOG.md.

Development

uv run --project cli pytest cli/tests    # from the repo root

The suite includes the capability-vocabulary drift guard, a synthetic divergent git topology reproducing the 2026-07-22 triple-stranding incident classes, the ledger push-rejection race test, subprocess-driven guard hook tests (synthetic PreToolUse JSON on stdin), a recorded fake forge for the lock lifecycle, a real two-persona worktree fixture, the waiver downgrade/expiry cases, the capability-rules artifact tests (packaged + versioned, verb set ≡ the frozen vocabulary, guard-consumes-the-data mutation test), and the pydantic-ai adapter tests (offline TestModel/FunctionModel: capability omission, write scoping, a scripted-and-vetoed git push origin main, the clean import-error path), the baron init acceptance tests (layout + self-validation via the real schemas + runtime kits + the non-empty-dir refusal), and the template drift guard (test_template_sync.py: the vendored src/baron/data/templates/ must stay byte-identical to skills/barony/assets/collab-repo/ — re-vendor with python cli/scripts/sync_templates.py). The dev dependency group repeats the pydantic-ai extra's pins so those tests run for real.