…#2482)

RemoteClaw middleware delegates LLM execution to CLI agents — leftover
scaffolding from the pre-fork embedded Pi engine still lingered in tests
that were excluded from running anyway, and in docs that prompted for
gutted concepts (thinking-level config, pi-embedded-runner, runEmbeddedPiAgent).

Tests (all excluded from vitest.unit.config.ts — never actually ran):
- Delete src/commands/agent.test.ts
- Delete src/auto-reply/reply.block-streaming.test.ts
- Delete src/auto-reply/reply/agent-runner.runreplyagent.e2e.test.ts
  (e2e, 37/42 failed locally — all tests mocked a dead runEmbeddedPiAgent)
- Delete src/auto-reply/reply/agent-runner.media-paths.test.ts
- Rename stale runEmbeddedPiAgentMock alias → runAgentMock in
  src/auto-reply/reply.triggers.trigger-handling.filters-usage-summary-*.cases.ts
  (live mock wired via ChannelBridge — assertions remain meaningful)

Source/infra:
- Delete src/agents/pi-embedded-helpers/failover-matches.ts (zero importers)
- scripts/test-parallel.mjs: drop deleted + non-existent .test.ts entries
- .fork-boundary-mock-baseline: 132 → 126 (decrease locked in)

Docs — obsolete runEmbeddedPiAgent / pi-agent-core / pi-embedded-runner:
- Delete docs/concepts/agent-loop.md (described pre-fork execution path)
- docs/astro.config.mjs, docs/start/hubs.md, docs/automation/hooks.md:
  drop agent-loop cross-refs
- docs/help/testing.md: drop "Embedded runner note" pointing at
  non-existent pi-embedded-runner test paths
- docs/reference/session-management-compaction.md: describe current CLI
  subprocess compaction forwarding instead of ensurePiCompactionReserveTokens
- docs/plugins/sdk-migration.md: drop runEmbeddedPiAgent code example +
  resolveThinkingDefault table row; explain that the pre-fork bridge has
  no RemoteClaw equivalent and plugins should route via agent.send RPC

Docs — obsolete thinking-level references (#2480 gutted the surface):
- docs/concepts/system-prompt.md, context.md, reference/token-use.md:
  align Runtime metadata description with current code (channel/user/timezone)
- docs/automation/cron-jobs.md, cron-vs-heartbeat.md, webhook.md,
  docs/gateway/configuration-reference.md, configuration-examples.md,
  doctor.md: drop `thinking` payload field / migration enumeration entries
- docs/concepts/session-tool.md: drop thinking? param from sessions_spawn
- docs/concepts/session.md: /status shows verbose toggle only
- docs/start/remoteclaw.md: drop "thinking defaults" tuning bullet
- docs/concepts/messages.md, help/faq.md, start/hubs.md: drop broken
  /tools/thinking page links and the gutted /thinking directive
- docs/platforms/macos.md: drop `thinking` from remoteclaw://agent query params

AC verification:
- `grep -rn "runEmbeddedPiAgent" src/` → zero hits
- `grep -rn "runEmbeddedPiAgent" docs/` → only explanatory note in
  sdk-migration.md (pre-fork bridge has no RemoteClaw equivalent)
- pnpm tsgo → clean
- pnpm lint → clean
- pnpm format → applied
- Fork-integrity gates: stub-debt (126 == 126), zombie-imports,
  throwing-stub-callers, rebrand-leakage → all pass

Closes #2482.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>