gtapps/hatch

Activate Dev Hermit

Set up the language-agnostic safety layer for this project. Requires claude-code-hermit core to be initialized first.

The plugin's identity in v0.3.0+: a thin wrapper around (a) git-push-guard strict-profile hook, (b) a CLAUDE-APPEND template (safety or standard) injected into the project's CLAUDE.md, (c) dev workflow skills (/dev-pr, /dev-quality, /dev-test) available but only prescribed in standard mode. There is no built-in implementer agent — operators use the native Agent tool, feature-dev, or custom subagents, all governed by the injected rules.

Plan

1. Check prerequisites

Check if .claude-code-hermit/config.json exists in the current project.

• Missing: ask the operator (AskUserQuestion) "Core hermit isn't set up yet. Run /claude-code-hermit:hatch now?" with options Yes — run now / No — I'll do it later.
  • If yes, follow the domain hatch continuation protocol (documented in claude-code-hermit:hatch):
    1. Write .claude-code-hermit/state/hatch-resume.json with { "skill": "claude-code-dev-hermit:hatch" }.
    2. Print: "(If setup doesn't continue automatically when core finishes, re-run /claude-code-dev-hermit:hatch.)"
    3. Invoke /claude-code-hermit:hatch via the Skill tool — terminal action, stop after the call.
  • If no, stop.
• Present: run .claude-code-hermit/bin/hermit-run domain-hatch preflight claude-code-dev-hermit and parse the JSON verdict. Branch on action:
  • upgrade-core-package / upgrade-core-applied → relay the remedy string verbatim to the operator and stop.
  • verify → this version (self_version) is already stamped; continue through the wizard, Step 3's block sync is the idempotency guard.
  • full → continue through the wizard.
  • ok: false → relay message and stop.

2. Capability scan + choose mode

Run all detection in a single parallel turn:

Bash:

• Existing PR template: ls .github/PULL_REQUEST_TEMPLATE.md .gitlab/merge_request_templates/Default.md .bitbucket/pull_request_template.md docs/pull_request_template.md 2>/dev/null | head -1.
• Installed plugins: claude plugin list 2>/dev/null or read .claude/settings.json.
• Remote forge (for commands.pr_create): git remote get-url origin 2>/dev/null — classify by substring:
  • github.com or github. → FORGE=github, DEFAULT_PR_CREATE="gh pr create"
  • gitlab.com or gitlab. → FORGE=gitlab, DEFAULT_PR_CREATE="glab mr create"
  • bitbucket.org → FORGE=bitbucket, DEFAULT_PR_CREATE="" (no universal CLI — operator must supply)
  • anything else or no remote → FORGE=custom, DEFAULT_PR_CREATE=""
• Capability scan: ls .claude/skills/ 2>/dev/null — list skill directory names. Match if any of the following dir names are present: commit, create-pr, pr, pull-request, release, git-commit. Record the matched names.
• Base-branch detection: git branch -r --format='%(refname:short)' 2>/dev/null | sed 's|^origin/||' — collect remote branch names. Record which of the following are present: main, master, develop, development, dev, trunk. Call this set CANDIDATE_BASES.

File reads:

• OPERATOR.md if present (check for ## Development Conventions section).
• The project's main config files for stack hints — package.json, Cargo.toml, pyproject.toml, Gemfile, pom.xml, go.mod. Use these only to seed reasonable defaults for the test command prompt in standard mode; never assume them.

Mode question:

Ask the operator a single AskUserQuestion:

questions: [
  {
    header: "Mode",
    question: "Which hatch mode? 'safety' injects only the git-safety and branch-discipline sections (recommended when this project already has its own /commit, /create-pr, or /release skills). 'standard' injects the full dev workflow.",
    options: [
      { label: "Keep current (<value>)", description: "Already configured" },        // only on re-run when hatch_mode already in config
      { label: "safety (recommended)", description: "Detected existing skills: <matched names> — skip /dev-quality, /dev-pr, /dev-test workflow sections." },   // when capability scan matched
      { label: "safety", description: "Inject only §Git Safety, §Branch Discipline, §Technical Constraints, and supporting sections." },   // when no match but operator chooses
      { label: "standard", description: "Inject the full workflow including §Implementation Flow and §Dev Quick Reference." }
    ]
  }
]

Placeholder convention. Strings in angle brackets (e.g. <value>, <matched names>) are templating placeholders — substitute concrete runtime values before passing to AskUserQuestion. Never pass the literal angle-bracket string.

When building the options array at runtime:

• If hatch_mode is already set in config.json, prepend Keep current (<value>) as the first (recommended) option.
• If the capability scan matched one or more skill dirs, surface safety (recommended) with the detected names; present standard as the alternative.
• If no scan match, present safety first and standard as the alternative.

3. Update CLAUDE.md / CLAUDE.local.md dev block

Resolve target file: Step 1's preflight already returned target, target_file, target_default and needs_target_question.

If needs_target_question is true, ask with AskUserQuestion (header: "Visibility") — target_default at position 0 with (recommended) in the label: .local files (gitignored — operator-personal) / Committed files (shared with teammates). Then record the choice:

.claude-code-hermit/bin/hermit-run domain-hatch ensure-target claude-code-dev-hermit --target <choice>

Write the block. The dev block is rendered per mode, so pipe the rendering in — the rendered content is what sync-block compares against, which is how a mode change becomes a replacement:

bun ${CLAUDE_PLUGIN_ROOT}/scripts/render-append.ts <mode> | .claude-code-hermit/bin/hermit-run domain-hatch sync-block claude-code-dev-hermit --rendered-stdin

<mode> is Step 2's answer (safety or standard). The script appends when the marker is absent, replaces when the rendering differs, and skips when it is already current. The rendered output is the source of truth; no operator prompt is needed.

Stray-block migration (block stranded in the non-target file after a target flip) is handled one-shot by the Upgrade Instructions in this version's CHANGELOG entry, executed by hermit-evolve Step 7. Hatch itself stays focused on target-aware setup and steady-state refresh.

4. Ask about remaining settings

Round 1 — commands and safety (standard mode only)

In safety mode, skip this round entirely — do not prompt for commands.test, commands.lint, commands.format, or commands.pr_create. These keys feed workflow sections that are not injected. The dev-hermit skills (/dev-test, /dev-quality, /dev-pr) remain available; if invoked, they will prompt for commands.test on first use.

In standard mode, ask a single AskUserQuestion with up to 4 questions. ALWAYS include all four; for keys already in config.json, prepend Keep current (<value>) as the first option (and recommend it).

questions: [
  {
    header: "Test cmd",
    question: "How do you run the test suite? (e.g. `npm test`, `pytest -q`, `cargo test`, `go test ./...`)",
    options: [
      { label: "Keep current (<value>)", description: "Already configured" },          // only on re-run
      { label: "<detected default>", description: "Auto-detected from <package.json|Cargo.toml|...>" },
      { label: "Other", description: "Type the command" }
    ]
  },
  {
    header: "Lint cmd",
    question: "Lint command? (optional — leave blank to skip)",
    options: [
      { label: "Keep current (<value>)", description: "Already configured" },
      { label: "<detected default>", description: "From package.json scripts.lint / project config" },
      { label: "Skip", description: "No lint step" },
      { label: "Other", description: "Type the command" }
    ]
  },
  {
    header: "Format cmd",
    question: "Format command? (optional — leave blank to skip)",
    options: [
      { label: "Keep current (<value>)", description: "Already configured" },
      { label: "<detected default>", description: "From project config" },
      { label: "Skip", description: "No format step" },
      { label: "Other", description: "Type the command" }
    ]
  },
  {
    header: "Protected",
    question: "Protected branches (comma-separated, glob patterns OK)?",
    options: [
      { label: "Keep current (<value>)", description: "Already configured" },
      { label: "main, master", description: "Defaults" },
      { label: "Other", description: "Type the list" }
    ]
  }
]

In safety mode, ask only the Protected question (single AskUserQuestion call with one question).

Round 2 — hook profile and companions

git-push-guard defaults to strict. The wizard does not ask which profile to use; it installs strict and offers an opt-out.

If env.AGENT_HOOK_PROFILE is already "strict" in config, replace the Hook question's options below with a single Keep current (strict already active) confirmation — never present an opt-out path that would silently downgrade an existing strict install.

Before asking Round 2, compute FALLBACK_BASE using the same priority order as /dev-pr Gate 0 step 4, but from the just-confirmed protected_branches from Round 1 (first non-glob entry → origin/HEAD → main/master). Then determine whether to include a Base branch question:

• If CANDIDATE_BASES has 2+ entries: include the question with those branches as options (plus Other).
• If CANDIDATE_BASES has exactly 1 entry and it differs from FALLBACK_BASE: silently set AUTO_BASE to that entry — no question needed, handled at step 5. Do not include the question in Round 2.
• All other cases (0 entries, 1 entry matching fallback, no remote): skip entirely — no question, no write at step 5.

On re-run: if pr_base_branch is already set in config, always include the question when CANDIDATE_BASES has 2+ entries, and prepend Keep current (<value>) as the first (recommended) option.

questions: [
  {
    header: "Hook",
    question: "Install git-push-guard at strict profile? (Blocks direct push to protected branches, --no-verify, force-push, --mirror/--all.)",
    options: [
      { label: "Yes — strict (recommended)", description: "Hook hard-blocks the listed operations" },
      { label: "No — leave at standard", description: "Prose rules in CLAUDE-APPEND still apply, but no hook enforcement" }
    ]
  },
  {
    header: "PR cmd",   // standard mode only (see below)
    question: "How should /dev-pr open the PR? (Invoked with --title, a body flag, and a base flag per the detected forge.)",
    options: [
      { label: "Keep current (<value>)", description: "Already configured" },          // re-run only
      { label: "gh pr create (recommended)", description: "Detected GitHub remote" },  // FORGE=github only
      { label: "glab mr create (recommended)", description: "Detected GitLab remote — uses --description and --target-branch" }, // FORGE=gitlab only
      // For FORGE=bitbucket:
      { label: "Skip — I'll configure later", description: "Bitbucket detected. No universally-available CLI exists — see docs/WORKFLOW.md for custom wrapper guidance. /dev-pr will fail until commands.pr_create is set in .claude-code-hermit/config.json." },
      // For FORGE=custom:
      { label: "Skip — I'll configure later", description: "/dev-pr will fail until commands.pr_create is set in .claude-code-hermit/config.json." },
      { label: "Other", description: "Type a custom command or wrapper script. Must print the PR URL on a line starting with https://. Gate 3 passes --title, --body-file, --base — wrap your CLI if it uses different flags." }
    ]
  },
  {
    header: "PR template",   // standard mode only (see below)
    question: "PR template path? (auto-detected: `<detected or 'none'>`)",
    options: [
      { label: "Keep current (<value>)", description: "Already configured" },                  // re-run
      { label: "<detected path>", description: "Append this template after the assembled body" },  // when detected
      { label: "Skip", description: "No project PR template" },
      { label: "Other", description: "Type a path" }
    ]
  },
  {
    header: "Base branch",   // only when CANDIDATE_BASES has 2+ entries (standard mode only)
    question: "Which branch do PRs target? (detected candidates: <CANDIDATE_BASES>)",
    options: [
      { label: "Keep current (<value>)", description: "Already configured" },   // re-run only
      { label: "<branch>", description: "..." },   // one option per CANDIDATE_BASES entry
      { label: "Other", description: "Type a branch name" }
    ]
  },
  {
    header: "Plugins",
    question: "Install companion plugins?",
    multiSelect: true,
    options: [
      { label: "feature-dev", description: "Architect/explorer/reviewer agents for guided feature dev" },
      { label: "context7", description: "Live docs lookup for framework APIs" }
    ]
  }
]

In safety mode, skip the PR cmd, PR template, and Base branch questions; do not write commands.pr_create, pr_template_path, or pr_base_branch to config (these feed /dev-pr which is not prescribed in safety mode). Keep Hook and Plugins.

Filter the Plugins options array to only those NOT already installed (per the claude plugin list detection above). If the filtered list is empty, skip the Plugins question entirely.

If OPERATOR.md exists and does NOT contain a ## Development Conventions section, append the answers under that heading.

5. Write config and stamp version

Single atomic config.json write:

• claude-code-dev-hermit.hatch_mode — "safety" or "standard", from step 2.
• claude-code-dev-hermit.protected_branches — array. The prompt accepts a comma-separated string; split on ,, trim each entry, drop empties before writing.
• env.AGENT_HOOK_PROFILE:
  • If the operator accepted strict in Round 2 → write "strict".
  • Else if the existing value is already "strict" → preserve it (never silently downgrade).
  • Else → write "standard" explicitly. Do not leave the key unset; an explicit value makes the operator's choice durable across hermit-evolve runs and prevents silent re-prompting.
• _hermit_versions["claude-code-dev-hermit"] — set to self_version from Step 1's preflight.

In standard mode only, also write:

• claude-code-dev-hermit.commands.test — required, from Round 1.
• claude-code-dev-hermit.commands.lint — optional.
• claude-code-dev-hermit.commands.format — optional.
• claude-code-dev-hermit.commands.pr_create — from the Round 2 PR cmd answer. If the operator chose Skip, leave the key absent (do not write null or empty string). Preserve any existing operator override on re-run.
• claude-code-dev-hermit.pr_template_path — optional, from Round 2.
• claude-code-dev-hermit.pr_base_branch — write only if the chosen branch (from the Round 2 Base branch question, or AUTO_BASE from the single-match case) differs from FALLBACK_BASE. If equal or not set, leave the key absent so /dev-pr's fallback chain operates undisturbed.

For each selected companion plugin: claude plugin install <plugin>@claude-plugins-official --scope project.

6. Report results

Print a summary that reflects what actually happened:

Dev hermit activated (claude-code-dev-hermit vX.Y.Z).

Mode: safety  [or: standard]
  Injected: §Git Safety, §Branch Discipline, §Technical Constraints  [safety]
  Injected: §Git Safety, §Branch Discipline, §Implementation Flow, §Technical Constraints  [standard]

Git safety:
  Hook profile: strict (git-push-guard active)  [or: standard — no hook enforcement]
  Protected branches: main, master  [or whatever was set]

Commands:  [standard mode only]
  Test:   <cmd>
  Lint:   <cmd or 'skipped'>
  Format: <cmd or 'skipped'>
  PR cmd: <commands.pr_create or 'unset — /dev-pr will fail until configured via /hatch'>

Updated:
  CLAUDE.md — dev block [appended / updated to vX.Y.Z / already current]
  OPERATOR.md — dev conventions [added / already present / skipped]
  PR template: <path or 'none'>  [standard mode only]

Companion plugins:
  [installed: feature-dev, context7  /  partial  /  none]

Available skills:
  /claude-code-dev-hermit:hatch    — re-run to update settings (idempotent)
  /claude-code-dev-hermit:dev-pr   — push the current branch and open a PR
  /claude-code-dev-hermit:dev-test — run the configured test suite and warm test cache
  /claude-code-dev-hermit:dev-quality — pre-wrap quality gate (cleanup pass + test re-run)

Conventions are in CLAUDE.md (§Git Safety, §Branch Discipline). [safety]
Conventions are in CLAUDE.md (§Git Safety, §Branch Discipline,
§Implementation Flow). [standard]
Any agent doing dev work in this project — native Agent, feature-dev, custom — must follow them.

Docker network requirements

Read by /claude-code-hermit:docker-security when the operator enables LAN containment + DNS policy. Intentionally empty for this plugin.

Domains (DNS allowlist)

(none — see note below)

LAN allowlist suggestions

(none — see note below)

Why empty. claude-code-dev-hermit is a language-agnostic safety layer. Dev workflows are inherently arbitrary — a project might pull packages from any registry (npm, PyPI, RubyGems, crates.io, Maven Central, Docker Hub, custom internal mirrors), reach any cloud provider's API, fetch from any git host, or talk to any local service. We can't pre-declare what your specific project needs without being wrong for the next operator.

What to do instead: in /docker-security, choose "Yes — recommended (LAN block + DNS log-only)" for Prompt 1 the first time you run it. Run your usual dev workflows for a few days, then read .claude-code-hermit/state/dns.log for the domains your project actually contacted. Add the ones you trust to .claude-code-hermit/docker/dnsmasq.allowlist (one server=/<domain>/1.1.1.1 line each), restart the netguard sidecar, and re-run /docker-security to flip to enforce mode. Strict DNS is hostile to arbitrary dev workflows out of the box — log-only is the right starting posture.

---

Rules

• Strict-by-default. The wizard defaults to installing git-push-guard at strict. Do not ask "which profile?" — ask "yes or opt out?".
• Idempotent. Re-running detects existing config.json values and offers Keep current (<value>) as the first option per key, so operators can fast-confirm with Enter presses.
• Single source of truth. CLAUDE-APPEND.md rendered for the chosen mode by scripts/render-append.ts is the source for the project's dev conventions. Step 3 pipes that rendering into sync-block, which overwrites the marked block whenever it differs; do not preserve operator edits to that block (operators who want overrides put them elsewhere in their CLAUDE.md).
• Never downgrade hook profile. If the operator chooses "No — leave at standard" but env.AGENT_HOOK_PROFILE is already strict, preserve strict. The opt-out only applies on first install.
• No stack detection magic. Detection seeds defaults for prompts; operators always confirm. Never write commands.test from detection alone — it must be operator-confirmed.
• Safety mode skips workflow prompts. In safety mode, do not prompt for commands.test, commands.lint, commands.format, commands.pr_create, pr_template_path, or pr_base_branch. These keys feed workflow sections that safety mode does not inject.
• PR cmd question options are built dynamically. The PR cmd question options array is constructed at runtime: include Keep current only on re-run; include the forge-recommended option only when FORGE is github or gitlab; include the forge-specific Skip message for FORGE=bitbucket or a generic Skip for FORGE=custom; always include Other. Never show more than 4 options at once — omit Keep current on first run.