This PR improves the im.message.receive_v1 event output by exposing structural
metadata fields (reply context, sender type, mentions) that were previously only
available in the raw V2 envelope. It also syncs the same structural fields to the legacy
+subscribe --compact pipeline.
Replace every command-facing error path in the event domain — the
consume/schema command layer, the +subscribe shortcut, EventKey
definitions, and the consume orchestration — with typed errs.*
envelopes, so consumers get stable type, subtype, param, hint, and
missing_scopes metadata for classification and recovery instead of
free-form message text.
- Input validation (--jq, --param, --output-dir, --filter, --route,
unknown EventKey, EventKey params) reports validation /
invalid_argument with the offending flag in param and an actionable
hint.
- Scope preflight reports authorization / missing_scope with the
machine-readable missing_scopes list; console-subscription and
single-bus preconditions report failed_precondition with recovery
hints.
- The consume API boundary passes already-typed errors through and
classifies transport, non-JSON HTTP, and unparsable responses; the
vc note-detail retry now matches the not-found code on typed errors
(it silently never fired against the legacy envelope shape).
- Previously-bare failures exited 1 with a plain-text "Error:" line
and now exit with their category code (validation 2, auth 3,
network 4, internal 5) alongside the typed stderr envelope.
- forbidigo and errscontract guards now cover the event paths so
regressions fail lint; AGENTS.md and the lark-event skill document
the typed contract for agent consumers.
Validation: make unit-test (race) green; event unit and e2e suites
assert category/subtype/param/hint and cause preservation against the
real binary; errscontract and golangci lint clean.
91-enjoy