#95 PR-2 — Events, broadcasts, auto-participant + auto-link (decision_links)

#118 (#95 PR-2 events/broadcasts/auto-link) merged to master (affd2c7). MAIN follow-up 4d7d228: the decision_links unique-index auto-name (68 chars) exceeded MySQL's 64-char identifier limit — the ADD UNIQUE ALTER failed mid-migration (columns+PK+FK auto-committed, 4 indexes missing, migration unrecorded) while the worker's sqlite tests passed. Fixed by naming the index explicitly (decision_links_unique); dropped the empty 0-row orphan table (operator-approved) and re-ran migrate → [53] Ran with all 4 indexes + FK. Suite 797/799 green, pint clean, build OK. Worker 1062 closed. Follow-up flagged by worker: smoke-test /decisions live-refresh on MAIN with Reverb (broadcasts verified via Event::fake).

PR-2 shipped on flower/95-pr2-events-autolink @ 71ebc9b (Brief: #118 trailer). Every layer exercised. - Events (net-new, ShouldBroadcast): DecisionPosted / DecisionAnswered / DecisionReleased, fanning out on `decisions` + `project.{id}` (when scoped) + `briefs.{id}` (Brief-subject) via a shared DecisionChannels helper. Dispatched from DecisionService (covers every entry point: MCP tools, board, brief shims). Retained BriefQuestionPosted/Answered still fire on briefs.{id} for the brief-detail view. Broadcast payload = new RecallService::decisionSummary (aligned with the MCP decisionPayload). - decision_links: table (brief_links template) + DecisionLink model (reuses BriefLinkRelation) + Decision::links(). DecisionAutoLinkService (bounded): a Brief-subject decision auto-links its subject brief as a `reference` link so PR-4 view-more + PR-9 chunk-weaving read a uniform decision_links surface (PR-9 spec explicitly weaves "linked brief title/excerpt" from decision_links — this feeds it). Standalone decisions link nothing. Idempotent. - Auto-participant on every mutating call: closed the gap — ack on a brief-subject decision now attaches the acker as a brief participant (ask/answer already did via BriefService). - Live board: Decisions\Index subscribes to the `decisions` channel and re-renders on every Decision broadcast (mirrors Roster/DaemonCheckedIn), with a wire:poll.30s blade fallback. New `decisions` + `project.{id}` channel auth (open, like briefs/roster). GATE: `MEILISEARCH_KEY=LARAVEL-HERD ANTHROPIC_API_KEY= ~/bin/php artisan test` → 799 tests, 796 passed / 3 skipped (same PR-1 skips) / 0 failed; pint clean. +9 new tests (DecisionEventsTest, DecisionAutoLinkServiceTest). Migration 2026_07_03_240000_create_decision_links_table applies clean on sqlite (RefreshDatabase across the suite). HANDOFF (orchestrator on MAIN): live Echo pop-in is verified in the worktree only via Event::fake (dispatch + channel fan-out) — the actual Reverb broadcast + browser live-update can only be confirmed on MAIN with Reverb up (analogous to PR-1's Flux-live-render skip). Please smoke the /decisions board live-refresh on MAIN after merge. No new daemons run in the worktree; MAIN's Reverb/Horizon untouched.

## PR-2 — Events, broadcasts, auto-participant + auto-link (child of #95) `DecisionPosted` / `DecisionAnswered` / `DecisionReleased` (ShouldBroadcast, on `decisions` + `project.{id}` + `briefs.{id}`-for-Brief). `decision_links` table + model (brief_links template) + `DecisionAutoLinkService`. Auto-participant on every mutating call. Live pop-in on the board via Echo with a `wire:poll.30s` fallback. Deps: PR-1 (#117). Design ref: #95 §5.4 / §5.6 / §8. `php artisan test` green + pint. `Brief: #118` trailer.