fix(kimi): support Kimi Code CLI v2 storage and wire schema

[wangerry]

Summary

Kimi Code CLI >= 0.39 changed its storage location and schema: session data
moved from ~/.kimi/ to ~/.kimi-code/ (env KIMI_CODE_HOME), and the
context.jsonl/metadata.json/state.json v1 layout was replaced by a
session_index.jsonl index, workspaces.json, v2 state.json, and a
protocol-1.5 event log at agents/main/wire.jsonl. The existing parser was
stuck on the old format and found no sessions.

Changes

• Discovery: read session_index.jsonl ({sessionId, sessionDir, workDir}) with a sessions/wd_*/session_*/ directory-scan fallback;
  resolve cwd from state.json, the index workDir, or workspaces.json
• Metadata: parse v2 state.json (id, cwd, epoch-ms
  createdAt/updatedAt, archived, title, lastPrompt,
  agents.main.homedir, lastTurnReason); extract model from
  profile.bind/llm.request
• Conversation: reconstruct messages from the protocol-1.5 wire log in a
  single streaming pass — turn.prompt user turns (task/injection origins
  skipped), content.part text/think blocks, tool.call records (object
  args), usage.record token totals
• Fidelity: emit a warning when the wire log records a full context
  compaction; keep dropped-record counting and source metadata
• Legacy fallback: pre-0.39 ~/.kimi/sessions/<md5>/ sessions with
  context.jsonl/metadata.json remain readable
• Registry: storagePath → ~/.kimi-code/sessions/, envVar →
  KIMI_CODE_HOME (KIMI_SHARE_DIR kept in extraEnvVars for cache
  invalidation)
• Schemas/tests/docs: add KimiStateV2Schema,
  KimiSessionIndexEntrySchema, KimiWireRecordSchema; rewrite Kimi
  fixtures/parser tests for the v2 layout; update README and all
  docs/parser-documentation Kimi files

Verification

• pnpm run check — no new lint/build errors (3 pre-existing errors
  unrelated to this change)
• pnpm test — 925 passed / 2 skipped
• End-to-end on a real machine: continues list discovers 2 real v2
  sessions; continues resume <kimi-session> --in codex --debug-prompt
  generates a full handoff (43KB markdown, conversation + 189 tool calls +
  pending tasks + fidelity warning for compaction), and the
  .continues-handoff.md file is written to the project directory

---

Summary by cubic

Fixes Kimi session discovery for Kimi Code CLI >= 0.39, which moved storage from ~/.kimi/ to ~/.kimi-code/ and swapped the v1 layout for a session_index.jsonl index, workspaces.json, v2 state.json, and a protocol-1.5 wire.jsonl. The parser previously found no sessions with the new CLI; it now reads the new layout, with pre-0.39 ~/.kimi/ sessions still readable as a fallback.

Session discovery and parsing

• Discovers sessions via the index with a sessions/wd_*/session_*/ scan fallback, resolving cwd from state.json, the index workDir, or workspaces.json.
• Reconstructs messages and tool calls from agents/main/wire.jsonl, mapping user turns, text/think blocks, tool.call records, and token usage.
• Extracts v2 metadata (epoch-ms timestamps, title, archived flag, model) and warns when the wire log records a full context compaction.

Registry, schemas, and tests

• Updates registry storagePath to ~/.kimi-code/sessions/ and envVar to KIMI_CODE_HOME, keeping KIMI_SHARE_DIR for cache invalidation.
• Adds KimiStateV2Schema, KimiSessionIndexEntrySchema, and KimiWireRecordSchema and rewrites fixtures, parser tests, and Kimi docs.

^{Written for commit 29a997c. Summary will update on new commits.}