Bootstrap Skill

Overview

This skill runs when the Bootstrap Gate is closed (missing CLAUDE.md, Session Config, or .orchestrator/bootstrap.lock) or when the user invokes /bootstrap directly. It scaffolds the minimum structure required by all session-orchestrator skills, commits it, and writes the lock file that opens the gate for all future invocations.

Anti-bureaucracy contract: At most ONE AskUserQuestion call in the normal case (tier confirmation). A second question is only asked when the archetype is truly ambiguous on the Public Path for Standard/Deep tiers. No wizard, no multi-step flow.

Invocation Context

Before starting, determine how this skill was invoked:

• Transitive (gate-closed): Invoked from another skill's Phase 0. The user's original intent (their first prompt) is available in context. After bootstrap completes, execution must return to the original skill's Phase 1.
• Direct (/bootstrap): User invoked manually. Parse $ARGUMENTS for flags: --fast, --standard, --deep, --upgrade <tier>, --retroactive. See commands/bootstrap.md for flag semantics.

Store INVOCATION_MODE = transitive | direct.

Mode dispatch (direct invocation only):

• If --upgrade <tier> is present in $ARGUMENTS: jump to Upgrade Flow section. Do not proceed to Phase 1.
• If --retroactive is present in $ARGUMENTS: jump to Retroactive Flow section. Do not proceed to Phase 1.
• If --sync-rules is present in $ARGUMENTS: jump to Sync-Rules Flow section. Do not proceed to Phase 1.
• If --ecosystem-health is present in $ARGUMENTS: jump to Ecosystem-Health Flow section. Do not proceed to Phase 1.
• Otherwise: continue to Phase 1 below.

Phase 0.5: Determine Private vs. Public Path

Before dispatching to any tier template, read skills/bootstrap/public-fallback.md and execute Step 1 (PATH_TYPE detection). Store the result as PATH_TYPE = private | public. This detection is silent — no user interaction.

• private: plan-baseline-path is present in Session Config AND the path exists on disk. Baseline templates will be used for CLAUDE.md generation and archetype file sourcing.
• public: plan-baseline-path is absent, empty, or points to a non-existent path. Plugin-bundled templates from templates/ will be used.

Pass PATH_TYPE into Phase 1 and all subsequent phases. All tier templates (fast-template.md, standard-template.md, deep-template.md) must consult public-fallback.md for CLAUDE.md generation and archetype file sourcing when PATH_TYPE = public.

Phase 1: Detect Tier + Archetype

Read skills/bootstrap/intensity-heuristic.md and execute the tier + archetype recommendation algorithm.

Inputs to the heuristic:

1. User's first prompt — the message that triggered this skill (most important signal)
2. Repo name — basename $(git rev-parse --show-toplevel) (secondary signal)
3. Existing files — ls -la of repo root (presence of package.json, pyproject.toml, etc. shifts archetype)
4. $ARGUMENTS flags — if --fast, --standard, or --deep is present, skip heuristic and use the specified tier directly

Output from Phase 1:

• RECOMMENDED_TIER = fast | standard | deep
• RECOMMENDED_ARCHETYPE = static-html | node-minimal | nextjs-minimal | python-uv | null
• HEURISTIC_REASON = one-sentence explanation of why this tier was chosen (shown to user)
• PATH_TYPE = private (plan-baseline-path configured and path exists) | public (no baseline)

Detecting PATH_TYPE: Already determined in Phase 0.5 — use the stored PATH_TYPE value. Do not re-run detection.

Fast tier: RECOMMENDED_ARCHETYPE is always null. No stack selection needed.

Phase 2: Present Tier Confirmation (One Question)

Present exactly one AskUserQuestion unless:

• $ARGUMENTS includes --fast, --standard, or --deep (tier pre-selected, skip question)
• --retroactive flag (no scaffolding at all, skip to Phase 4)

AskUserQuestion({
  questions: [{
    question: "Leeres Repo erkannt. Basierend auf '<HEURISTIC_REASON>' empfehle ich **<RECOMMENDED_TIER>**. Passt das?",
    header: "Bootstrap",
    options: [
      { label: "<RECOMMENDED_TIER> (Empfohlen)", description: "<one-line description of what this tier scaffolds>" },
      { label: "fast", description: "Nur CLAUDE.md + .gitignore + README. Für Demos, Spikes, Playgrounds." },
      { label: "standard", description: "Fast + package.json/Manifest + TypeScript + Linting + Tests. Für MVPs und echte Produkte." },
      { label: "deep", description: "Standard + CI + CODEOWNERS + CHANGELOG. Für Production, Team, Langlebige Repos." },
      { label: "Abbrechen", description: "Bootstrap abbrechen. Das ursprüngliche Kommando wird ebenfalls abgebrochen." }
    ],
    multiSelect: false
  }]
})

If user selects "Abbrechen": stop. Report "Bootstrap abgebrochen. Kein Kommando wird ausgeführt." Do not continue.

Store confirmed tier as CONFIRMED_TIER.

Optional Second Question (Public Path + Standard/Deep + Ambiguous Archetype Only)

If ALL of the following are true:

1. PATH_TYPE = public
2. CONFIRMED_TIER is standard or deep
3. intensity-heuristic.md returned ARCHETYPE_CONFIDENCE = low (truly ambiguous)

Then ask one more question — and only then:

AskUserQuestion({
  questions: [{
    question: "Welchen Tech-Stack soll ich für das Grundgerüst verwenden?",
    header: "Archetype",
    options: [
      { label: "node-minimal", description: "package.json + TypeScript + Vitest. Für CLIs, Tools, Libraries." },
      { label: "nextjs-minimal", description: "Next.js bare setup. Für Web Apps, SaaS, Fullstack." },
      { label: "static-html", description: "HTML/CSS/JS, kein Build-Step. Für Animationen, Landingpages, Visualisierungen." },
      { label: "python-uv", description: "pyproject.toml + uv + pytest. Für Python Scripts, APIs, ML." }
    ],
    multiSelect: false
  }]
})

Store as CONFIRMED_ARCHETYPE. Maximum interactions in bootstrap flow: 2 questions total.

Upgrade Flow (--upgrade <tier>)

Entered when $ARGUMENTS contains --upgrade <tier>. No scaffolding questions are asked.

Steps:

1. Read existing lock. Read .orchestrator/bootstrap.lock. If missing, abort with: Error: No bootstrap.lock found. Run /bootstrap first to bootstrap this repo.

2. Parse current and target tier.

   • CURRENT_TIER = value of tier: field in the lock file.
   • TARGET_TIER = the <tier> argument supplied after --upgrade.
   • Valid values for both: fast | standard | deep.

3. Refuse downgrade. Tier order: fast < standard < deep. If TARGET_TIER ranks lower than or equal to CURRENT_TIER, abort with: Error: Cannot downgrade from <CURRENT_TIER> to <TARGET_TIER>. Upgrade path is one-directional (fast → standard → deep). Exit non-zero.

4. Compute delta. Determine which files the target tier adds over the current tier:

   • fast → standard: all Standard-tier files (package.json/pyproject.toml, tsconfig.json, eslint.config.mjs, .prettierrc, .editorconfig, tests/, src/)
   • standard → deep: all Deep-tier files (CI pipeline, CODEOWNERS, CHANGELOG.md, issue templates, MR/PR template, branch protection)
   • fast → deep: union of both deltas (apply Standard first, then Deep)

5. Check idempotency. For each file in the delta, skip if it already exists on disk. Only write files that are absent. This makes the operation safe to run twice.

6. Apply delta files. Execute only the relevant template steps for the missing files. Read the appropriate template (standard-template.md and/or deep-template.md) and execute ONLY the steps that produce the delta files. Do NOT re-run already-completed steps.

7. Update bootstrap.lock atomically. Overwrite .orchestrator/bootstrap.lock with tier: <TARGET_TIER>. Preserve archetype, timestamp (update to now), and source from the existing lock. Write `plu