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/shared/context-limit-resolver.ts

@@ -19,6 +19,10 @@ function getAnthropicActualLimit(modelCacheState?: ContextLimitModelCacheState):
     : DEFAULT_ANTHROPIC_ACTUAL_LIMIT
 }
 
+function supportsCachedAnthropicLimit(modelID: string): boolean {
+  return /^claude-(opus|sonnet)-4(?:-|\.)6(?:-high)?$/.test(modelID)
+}
+
 export function resolveActualContextLimit(
   providerID: string,
   modelID: string,
@@ -29,7 +33,7 @@ export function resolveActualContextLimit(
     if (explicit1M === 1_000_000) return explicit1M
 
     const cachedLimit = modelCacheState?.modelContextLimitsCache?.get(`${providerID}/${modelID}`)
-    if (cachedLimit) return cachedLimit
+    if (cachedLimit && supportsCachedAnthropicLimit(modelID)) return cachedLimit
 
     return DEFAULT_ANTHROPIC_ACTUAL_LIMIT
   }