fix: resolve 25 pre-publish blockers

- postinstall.mjs: fix alias package detection
- migrate-legacy-plugin-entry: dedupe + regression tests
- task_system: default consistency across runtime paths
- task() contract: consistent tool behavior
- runtime model selection, tool cap, stale-task cancellation
- recovery sanitization, context-limit gating
- Ralph semantic DONE hardening, Atlas fallback persistence
- native-skill description/content, skill path traversal guard
- publish workflow: platform awaited via reusable workflow job
- release: version edits reapplied before commit/tag
- JSONC plugin migration: top-level plugin key safety
- cold-cache: user fallback models skip disconnected providers
- docs/version/release framing updates

Verified: bun test (4599 pass), tsc --noEmit clean, bun run build clean

src/hooks/atlas/idle-event-lineage.test.ts

@@ -6,7 +6,7 @@ import { tmpdir } from "node:os"
 import { join } from "node:path"
 import { clearBoulderState, readBoulderState, writeBoulderState } from "../../features/boulder-state"
 import type { BoulderState } from "../../features/boulder-state"
-import { _resetForTesting, setSessionAgent, subagentSessions } from "../../features/claude-code-session-state"
+import { _resetForTesting, registerAgentName, setSessionAgent, subagentSessions } from "../../features/claude-code-session-state"
 
 const { createAtlasHook } = await import("./index")
 
@@ -64,6 +64,8 @@ describe("atlas hook idle-event session lineage", () => {
     promptCalls = []
     clearBoulderState(testDirectory)
     _resetForTesting()
+    registerAgentName("atlas")
+    registerAgentName("sisyphus")
     subagentSessions.clear()
   })