Skeeper

Skeeper Reference Guide

Comprehensive reference for the skeeper CLI: a Go binary that mirrors spec artifacts into a sidecar Git repository with a tracked lockfile, so a main repository's PR diffs stay focused on code and every commit can prove which spec state shipped with it.

What Is Skeeper

• Lockfile-backed reliability. skeeper.lock is committed to the main repo and pins each main commit to exact sidecar commits per namespace, with content digests, file counts, and byte counts.
• Strict managed hooks. pre-commit and pre-merge-commit mirror staged content, push the sidecar, write skeeper.lock, and stage it before Git creates the main commit. pre-push checks the lock before the main repo is pushed.
• Namespaces in shared sidecars. Many projects can share one sidecar Git remote without colliding because each project owns a namespace prefix and uses branch-aware refs of the form <namespace>/__branches__/<source-branch>.
• Git-like convergence. pull brings remote docs in, push publishes local docs without pruning remote-only files, and sync runs pull then push.
• Safe by default. Local absence does not delete remote-only sidecar docs unless the user passes the explicit destructive --prune flag.
• One recovery door. status --check reports unhealthy states, and repair owns safe automatic repairs plus rescue reporting.
• Single-binary, local-first. Skeeper shells out to git (and gh only when skeeper init creates a brand-new sidecar repo). Every operation is debuggable with Git.

Mental Model: Four Invariants

1. skeeper.lock is the pinned state. It records sidecar URL, source branch, namespace branch, sidecar commit SHA, content digest, file count, and byte count. Never edit SHAs by hand.
2. Sync happens before the main commit, not after. Failure fails the commit. There is no async retry queue.
3. Failure fails closed unless you opt out. SKEEPER_SKIP=1 allows a single bypass that is recorded to .git/skeeper/bypass.json and surfaced in status, repair, and pre-push until cleared by skeeper sync or skeeper repair. git commit --no-verify is unsupported because Git skips all hook code.
4. pre-push checks before the remote sees the commit. A bypassed or stale lock blocks the push.

flowchart LR
    A[git commit] --> B[existing user hook content]
    B --> C[skeeper internal pre-commit]
    C --> D[collect owned staged specs]
    D --> E[fetch and rebase sidecar branch]
    E --> F[mirror namespace files into .skeeper/]
    F --> G[commit and push sidecar]
    G --> H[write and stage skeeper.lock]
    H --> I[main commit proceeds]
    I --> J[git push]
    J --> K[skeeper internal pre-push]

Quick Start

# Inside any Git repository
skeeper init
$EDITOR src/auth/SPEC.md
git add src/auth/service.go src/auth/SPEC.md
git commit -m "auth: design OAuth provider flow"
# the hook syncs the sidecar and stages skeeper.lock; commit it normally
git push

If the working tree already contains specs that should be sidecar-managed, pass --track during setup or run skeeper track <glob> --sync after init.

Command Map

--json produces deterministic machine-readable output where listed in the CLI reference. --dry-run is supported on mutating commands that can preview a plan. --force overrides broad-plan guardrails declared under settings.guardrails.

Hidden skeeper internal ... commands are Git hook and merge-driver plumbing. Do not recommend them to users or call them by hand unless you are testing Skeeper itself.

Freshness Contract

Treat this directory as the official Skeeper skill shipped with the repository. When the CLI surface changes, update this file and references/cli-reference.md in the same change. Audit against skeeper --help plus each public subcommand's --help; do not infer commands from older docs, old ledgers, or implementation helpers.

Historical commands such as hydrate, update, diff, reconcile, resolve, rescue, verify, fsck, hooks, merge-driver, adopt, and pattern are not public workflow guidance. If a user mentions one, translate the intent to the current public command model: status, pull, push, sync, restore, track, untrack, or repair.

For full per-flag detail, read references/cli-reference.md.

Configuration Cheatsheet

.skeeper.yml lives at the repository root and is committed. The minimum required shape:

sidecar: git@github.com:user/myproject-specs.git

namespaces:
  - name: project
    patterns:
      - "**/SPEC.md"
      - "docs/specs/**"
      - ".claude/plans/**"
      - "**/*.spec.md"
    exclude:
      - "docs/specs/private/**"

Optional operational defaults:

settings:
  guardrails:
    max_files: 100 # default 100
    max_bytes: 10485760 # default 10 MiB
  hooks:
    pre_push_timeout: 30s # default 30s
    allow_skip_env: SKEEPER_SKIP # default SKEEPER_SKIP

Four rules to know:

1. Unknown keys are rejected. Decode is strict.
2. exclude is the only public exclusion mechanism. Negative globs (!docs/private/**) inside patterns are rejected.
3. Ownership must be unique. If two namespaces match the same file, the plan fails with a request to add an exclude.
4. __branches__ is reserved. It is the segment that separates a namespace from its branch-aware refs.

For the full schema with every field and default, read references/config-reference.md.

Common Workflows

Bootstrap a new repository

skeeper init \
  --sidecar-name myproject-specs \
  --visibility private \
  --namespace project \
  --track "**/SPEC.md" \
  --track "docs/specs/**"
git add .skeeper.yml .gitignore
git commit -m "chore: bootstrap skeeper"

Join a repo with an existing sidecar

skeeper init --sidecar git@github.com:user/shared-specs.git \
  --namespace project \
  --track "**/SPEC.md"
skeeper restore --all
skeeper repair

init installs or refreshes hooks and merge-driver wiring. restore --all materializes the files pinned by the current skeeper.lock; repair is safe to run after clone setup and refreshes local hook state if needed.

Track files already in the working tree

skeeper track "docs/adrs/**" --sync
git add .skeeper.yml .gitignore skeeper.lock
git commit -m "chore: track ADRs in skeeper"

Use track without --sync when you only want to update coverage and will publish matching files in a later skeeper sync.

Merge docs from two clones

# clone A
skeeper sync
git commit -m "skeeper: sync docs"
git push

# clone B
git pull
skeeper sync
git commit -m "skeeper: sync docs"
git push

sync preserves both sides by default. It fetches sidecar state, restores remote-only docs locally, publishes local-only docs, and updates skeeper.lock.

Recover after a failed push or bypass

skeeper status --paths
skeeper repair --check
# fix network/auth/contention if reported, then:
skeeper repair
skeeper sync
skeeper status --check

repair --check is read-only. repair fixes safe local issues such as hook drift, interrupted transactions that can resume safely, stale bypass records after a healthy sync, and missing local sidecar objects. It stops on ambiguous overwrite/delete decisions.

Restore files from the lock

skeeper restore docs/specs/auth.md
skeeper restore --all

restore uses the locked sidecar commits by default. Use pull when you want the latest sidecar remote state instead of the current lock.

Resolve a skeeper.lock merge conflict

git merge feature/auth-redesign
# if the automatic merge driver was not wired locally:
skeeper repair
skeeper sync
git add skeeper.lock
git commit

Manual editing of scalar sidecar SHAs is unsupported. Regenerate the lock through Skeeper.

CI Integration

Same-repository GitHub Action wraps the released binary:

name: skeeper

on:
  pull_request:
  push:
    branches: [main]

jobs:
  check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: compozy/skeeper@v0.2.1
        with:
          args: |
            status
            --check
            --json
          ssh-private-key: ${{ secrets.SKEEPER_SSH_PRIVATE_KEY }}

Credential precedence:

1. ssh-private-key writes a temp key and sets GIT_SSH_COMMAND. The key is wiped on cleanup.
2. token configures HTTPS GitHub credentials in a per-job GIT_CONFIG_GLOBAL.
3. The runner's existing Git/SSH config is used when neither input is provided.

Secrets are always masked through ::add-mask:: before configuration.

When NOT To Use Skeeper

• Repos that already version specs in the main tree and want them to appear in PR diffs alongside code. Skeeper exists to keep specs out of those diffs.
• Teams that need PR review on the spec content itself before merge. Skeeper mirrors after the main commit succeeds, so spec review must happen against the sidecar repo or against the main-tree working copy before commit.
• Repos without a stable sidecar host. Skeeper requires a Git remote that the working tree can reach during commit; an unreachable remote means every commit fails closed unless someone uses SKEEPER_SKIP=1.
• Storing build artifacts, generated code, or large binaries. Skeeper is for spec-shaped text artifacts. Guardrails default to 100 files and 10 MiB per plan precisely to keep it that way.

Anti-Patterns for Agents

1. Never use git commit --no-verify on a skeeper-enabled repo. Use SKEEPER_SKIP=1 instead so the bypass is audited.
2. Never edit SHAs in skeeper.lock by hand. Use skeeper sync to regenerate the lock.
3. Never reuse a sidecar remote across projects without unique namespaces. Skeeper requires unambiguous routing; ownership must be unique per file.
4. Never bypass with SKEEPER_SKIP=1 and forget to run skeeper sync afterward. The bypass keeps surfacing in status, repair, and pre-push until cleared.
5. Never put negative globs in patterns. Use exclude instead; the loader rejects negative globs explicitly.
6. Never delete skeeper.lock to fix a merge conflict. Resolve it with skeeper repair/skeeper sync.
7. Never assume skeeper restore chases the latest tip. It restores from the locked commits; use skeeper pull for latest remote docs.
8. Never prune remote-only sidecar files accidentally. Use skeeper push --prune only when the local set is intentionally authoritative.
9. Never call skeeper internal commands in user workflow guidance. They are hook and merge-driver plumbing.

References

• references/cli-reference.md — every public command and flag.
• references/config-reference.md — full .skeeper.yml schema, defaults, and validation rules.