Merge remote-tracking branch 'origin/master' into codex/trim-ai-prose

# Conflicts:
#	docs/AGENTS.md
#	docs/config-catalog.md
#	packages/bash/bash-sandbox/src/index.ts
#	packages/bash/bash/src/session-mode.ts
#	packages/bash/tool-bash/README.md
#	packages/code-runtime/code-runtime-worker/README.md
#	packages/compact/compact/src/index.ts
#	packages/core/agent-core/README.md
#	packages/hooks/hooks-claude/src/config.ts
#	packages/hooks/hooks-claude/src/index.ts
#	packages/hooks/hooks-codex/src/config.ts
#	packages/hooks/hooks-codex/src/index.ts
#	packages/llm/llm/README.md
#	packages/session-persistence/session-persistence-jsonl/README.md
#	packages/session-persistence/session-persistence/README.md
#	packages/skill/skill-local/README.md
#	packages/support/acp-snapshot/README.md
#	packages/support/invariants/src/index.ts
#	packages/ui/acp/README.md
#	packages/ui/jsonrpc-agent/README.md
#	packages/ui/jsonrpc/README.md
#	packages/ui/permission/README.md
#	packages/ui/user-approval/README.md
#	packages/ui/user-interaction/README.md
#	packages/web/web-search-deepseek/README.md

packages/compact/compact/src/index.ts

@@ -1,7 +1,9 @@
 /**
- * The compaction service seam (`ctx.compact`): an abstract service defining what compaction
- * does — decide when to compact, summarize a range of conversation history into a single
- * surface node — without saying how.
+ * Compaction service seam (`ctx.compact`): implementations decide when to
+ * compact and replace a history range with one summary node by subclassing
+ * {@link CompactService}. This interface necessarily depends on session and LLM
+ * vocabulary; the rationale is in the
+ * [compaction RFC](../../../../docs/rfc/implemented/feature/2026-06-18-compaction-capability-seam.md).
  * @module @deepseek-ai/dsh-compact
  */