Completes §4.5 templates (M4a shipped routes). A group declares a trigger once;
the tree apply fans it out into one concrete per-app_id trigger on each
descendant app, reusing the M4a expansion engine over the trigger insert path.
- Migration 0054: `trigger_templates` table (group-owned; the whole
BundleTrigger wire object stored as `spec` JSONB, placeholders unresolved) +
`triggers.from_template` provenance column + index.
- `template_repo.rs`: trigger-template CRUD + chain-load.
- Manifest: `[group]` `[[trigger_templates]]` (flat: name, kind, script, + kind
params); build_bundle emits them; rejected on an app node.
- Apply: group nodes reconcile trigger-template rows; tree Phase B expands each
chain trigger template into a concrete trigger per descendant app —
placeholders resolved in every spec string leaf, then the typed trigger is
rebuilt and inserted through the shared `insert_bundle_trigger_tx` (email
secrets resolved + re-sealed per recipient app). Idempotent via from_template
(one trigger per template per app; semantic-identity compare → no-op /
delete+recreate / reap). Collision with a hand-declared trigger or between
templates is a hard error. Each resolved trigger is re-validated with the
per-kind shape check (cron/queue/etc.) so a {var:}-injected bad
schedule/timeout can't slip in.
- Authz: declaring → GroupScriptsWrite; receiving → AppManageTriggers, plus
AppSecretsRead for email-trigger recipients (parity with hand-declared email).
- Plan/token/report extended for trigger templates; blast radius covers both.
- Tests: tests/templates.rs trigger fan-out (kv + {app_slug}, stable-ids,
prune-reap); resolve_placeholders_in_json unit test; schema golden reblessed.
Reviewed (no CRITICAL; isolation + per-app email-secret sealing verified
sound). Closed a HIGH validation-parity gap (re-validate resolved triggers) and
a MEDIUM authz gap (AppSecretsRead for email expansions). v1.2 Hierarchies
template work (M4) complete.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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