Install the PRD-Driven Context Engineering methodology into a fresh OR existing repository — the subscription-native alternative to forking the whole repo. Runs an interactive wizard that seeds the framework (.claude/ hooks, skills, agents, rules, scripts) without clobbering product content. Triggers on "install the methodology", "adopt this into my repo", "self-install", "set up PRD lifecycle here", "onboard existing project". Outputs an installed framework + a verification report.
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See how to installReview the instructions the agent will receive before you install.
Install the methodology into a target repo from the install manifest, the way Xantham's blueprint installs from markdown: the agent runtime is the installer, so the whole thing runs inside your Claude Code subscription — no API key, no metered calls, no service to stand up.
Two paths, one manifest. This skill is the interactive path.
install.shis the deterministic CLI path. Both read.claude/install-manifest.yaml, so they can't drift. Prefer drivinginstall.shfrom this skill; fall back to manual copies only when the script isn't reachable.
.claude/install-manifest.yaml — authoritative framework / template_seed /
never_touch lists (the keystone; never hardcode file lists).install.sh — the deterministic installer this skill normally drives.ghm-template-sync Phase "Safety Rules" — never overwrite
MEMORY.md, SoT/*, PRD.md, README.md content.readiness.py runs).git, python3, awk are present; warn if the target isn't a git repo..claude/) vs brownfield (existing .claude/).
Brownfield means merge, never overwrite product.Ask only what changes the outcome (honor the execution mode's budget):
product (default) · library · infrastructure · research.[standard+]: keep all 4 agents + all skills (default), or trim to a role
subset. Quick mode skips this and installs everything.install.sh)Run the deterministic installer so behavior matches the CLI path exactly:
bash install.sh --target <DIR> --profile <PROFILE> # add --dry-run to preview
--dry-run plan first [standard+], then execute.--force
after the user confirms (mirrors ghm-template-sync "show diff before destructive").never_touch list.verify-blueprint.sh analog).claude/hooks/*.sh in the target; assert valid JSON on stdout.python scripts/readiness.py run — a non-zero exit on an empty scaffold is the
expected BLOCK gate (no content yet), not a failure. Report the score.README.md + PRD.md, then "Let's frame the problem".| Pattern | Fix |
|---|---|
| Hardcoding the file list in the skill | Read .claude/install-manifest.yaml |
Overwriting a brownfield repo's PRD.md/SoT | Honor never_touch; seed templates once |
| Treating readiness BLOCK on a fresh scaffold as a bug | It's the gate working — report the score |
Re-implementing copy logic instead of driving install.sh | One code path = no drift |
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Validates gate criteria before PRD lifecycle advancement by delegating to the readiness scoring pipeline (scripts/readiness.py). Returns a graduated PASS / WARN / BLOCK verdict with top blockers and their causal chain. Triggers before advancing from v0.X to v0.Y or explicit `/ghm-gate-check`.
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Extracts durable insights from temp/ files to SoT during EPIC Phase E. Triggers at EPIC completion or explicit `/ghm-harvest` invocation. Outputs new SoT entries and archive manifest.
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Validates and registers new SoT IDs with cross-reference integrity. Triggers when creating BR-XXX, UJ-XXX, API-XXX, or CFD-XXX entries. Outputs formatted SoT entry with validated cross-references.
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Creates new Source of Truth (SoT) files when existing templates don't fit your needs. Triggers on requests to create a new SoT file, add a new artifact type, or when user says "I need to track [X] but there's no SoT for it", "create SoT", "new source of truth". Outputs a properly structured SoT.*.md file with ID prefix, frontmatter, and update protocol.
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Synchronizes README.md Command Center with current project state. Triggers on gate changes, EPIC status changes, or explicit `/ghm-status-sync` invocation. Outputs updated README.md dashboard with current lifecycle stage, blockers, and metrics.
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Detect template version drift and guide migration to the latest template version. Compares current repo against the template, identifies what's outdated, and automates safe updates while protecting product-specific content. Triggers on requests to sync with template, update template version, check for template drift, or when user asks "sync template", "update to v3", "template drift", "check template version".
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