Add role-backed repo Discord identities

notes/voidbot-implementation-plan.md

@@ -188,6 +188,7 @@ The runner can hand these to a CLI/MCP tool. The store decides what survives.
 - the scheduled moderation runner has a typed rumination contract: bounded context in, reviewed prompt template, typed operation payloads out, parent-owned cursor/receipt recording
 - recent event timing in that bounded context now crosses a projection boundary first, so the child sees "5 minutes ago" language while the parent keeps exact timestamps for bookkeeping
 - public artifact sharing now crosses the same boundary: repo activity exposes content hints, rumination verifies authorship through retrieval, and a configured `publicSpeechTarget` lets Void queue a normal typed candidate intervention instead of needing a blog-specific announcement path
+- repo-scoped Discord participation now uses roles as the address boundary and registered webhook personas as the speech boundary. A role mention can summon a `repo-identity-mention` Codex job, but the worker suppresses base-bot auto-posting so the repo identity must speak through the `post_repo_identity_message` MCP tool.
 - repo-activity cursor advancement is parent-owned after successful normal rumination passes, so the child can inspect read-only repo weather without stale commits haunting every future pass as fresh material
 - the old memory-organ script family, legacy moderation state template, and legacy context exporter have now been deleted instead of preserved as forensic bait
 - deterministic cleanup is mostly recent scar tissue from failed manual cleanup passes; it should stay deleted rather than be ported unless a future typed operation protects a real invariant in the new model