service-knowledge extension

Self-gating service-registry status + drift notice for repos that carry a service-knowledge registry. Replaces the retired service-skills extension (which was blind to the canonical layout).

Self-gating

At extension init, the session cwd is scanned with the exact semantics of the service-knowledge package's find_umbrella_packs (packages/service-knowledge/src/service_knowledge/cli/common.py):

• candidate pack roots: [<cwd>/.xtrm/skills, <cwd>/.xtrm/skills/user/packs]
• reserved pack names are skipped: default, optional, user, active, local-legacy
• the NEW umbrella service-knowledge wins over the LEGACY service-skills per pack
• a pack counts only if <pack>/<umbrella>/service-registry.json exists

No registry found → the extension registers NOTHING: no tool, no command, no event handlers. Zero surface. Legacy layouts (.claude/service-registry.json, flat repo-root registries, registries under reserved pack names) are deliberately ignored — only the canonical per-pack umbrella layout counts.

Surface (registry present)

Context note (before_agent_start)

Every turn gets a custom message injected:

<service_knowledge_context>
service registry: 1 pack(s), 2 service(s)
- service-knowledge@infra (2 services)
drift: none detected
</service_knowledge_context>

With a pending drift marker — either the canonical .xtrm/.service-knowledge-drift-pending or the legacy wave-1 .xtrm/.service-skills-drift-pending (canonical wins when both exist):

drift: PENDING marker present (.xtrm/.service-knowledge-drift-pending) — reconcile with /updating-service-knowledge

/service-knowledge:status command

Prints via ctx.ui.notify:

service-knowledge status
pack: service-knowledge@infra
  umbrella: service-knowledge (registry: /path/.xtrm/skills/infra/service-knowledge/service-registry.json)
  services: 2
  - db-expert: last_sync_ref abc12345
  - auth-svc: last_sync_ref (never)
git HEAD: 296be429
drift marker: absent
suggested action: run /updating-service-knowledge to reconcile + stamp last_sync_ref

suggested action is none — registry is in sync with HEAD when every service last_sync_ref matches git HEAD and no drift marker is present.

Reconciliation

Drift is reconciled with /updating-service-knowledge (the service-knowledge-sync specialist) — NOT /updating-service-skills. This extension only surfaces drift; it never auto-updates or rebuilds the index.

When knowledge is absent or stale

A drift marker (drift: PENDING in the context note, or a last_sync_ref behind git HEAD) is advisory — it never blocks work. Memory priority:

1. service-knowledge, if present — use the registry and skill bodies as-is; never grep-hunt for service-registry.json speculatively.
2. Commit corpus — always available — fall back to git log -p --follow -- <file> for per-file history, git log --grep/--oneline for corpus, and diffs vs last_sync_ref when a registry states one. Commits do not go stale.
3. bd memories — bd memories <topic> / bd recall <key> before workflow-sensitive questions; write findings back with bd remember.

Suggest the reconcile, proceed with current knowledge + commit corpus in parallel; stamp last_sync_ref only after a successful reconcile, and rebuild the index only after that.

Non-goals (v1)

• no auto-update execution
• no index rebuild trigger
• no enforcement — drift is surfaced, never acted on automatically

Relocation (xtrm-6z6.5)

This extension moved out of core/packages/pi-extensions (where it was extensions/service-knowledge/) into this standalone npm pi-package @jaggerxtrm/pi-service-knowledge, co-located with the service-knowledge Python package in the xtrm repo. The core bundle no longer ships it (src/manifest.json.disabled). python-kernel stays bundled in core @jaggerxtrm/pi-extensions. Install/enroll:

pi install npm:@jaggerxtrm/pi-service-knowledge   # or a local source path pre-merge