feat: add Oh My Pi support

[thekidnamedkd]

Problem

Oh My Pi sessions were invisible to continues. OMP stores session transcripts as JSONL under $PI_CODING_AGENT_DIR/sessions/ (default ~/.omp/agent/sessions/), but there was no parser, registry entry, fixture, or cross-tool handoff path for it.

That meant starting work in OMP and handing it off to Codex, Claude, Gemini, OpenCode, etc. lost the entire session.

Before

$ continues list --source omp
# omp was not a supported source

After

$ continues list --source omp --json -n 1
[
  {
    "source": "omp",
    "cwd": "/Users/kd-m2air/Local",
    "summary": "Add OMP support",
    "model": "openai-codex/gpt-5.5",
    "originalPath": "/Users/kd-m2air/.omp/agent/sessions/...jsonl"
  }
]

And OMP sessions can now generate normal handoff markdown:

# Session Handoff Context

## Session Overview
| Source | Oh My Pi |
| Session ID | `019f6a82-...` |
| Working Directory | `~/Local` |
| Session File | `~/.omp/agent/sessions/...jsonl` |

## Recent Conversation
...

## Tool Activity
...

## Session Origin
This session was extracted from **Oh My Pi** session data.

What changed

Added OMP as the 17th supported tool.

New parser support:

• Discovers OMP .jsonl sessions from $PI_CODING_AGENT_DIR/sessions/*/*.jsonl
• Defaults to ~/.omp/agent/sessions/
• Extracts session id, cwd, repo, title/summary, model, created/updated timestamps
• Keeps lightweight session ordering based on the latest OMP metadata updatedAt
• De-dupes duplicate session ids by newest updatedAt

New handoff data extracted:

• User/assistant/system conversation messages
• Tool execution start/result pairs by toolCallId
• Shell/read/write/edit/grep/glob/search/MCP tool summaries via SummaryCollector
• Modified files from write/edit activity
• Model/provider metadata
• Token usage, cache tokens, thinking tokens
• Thinking level configuration
• Session lifecycle events
• Timeline events for messages, tool calls, tool results, and exits

CLI integration:

• Adds omp to TOOL_NAMES
• Registers OMP in src/parsers/registry.ts
• Exports parseOmpSessions / extractOmpContext
• Adds native resume display/args: omp --resume <id>
• Adds cross-tool handoff support with positional prompt argument

Docs and metadata:

• README supported-tool table now includes Oh My Pi
• README storage table documents $PI_CODING_AGENT_DIR/sessions/
• Package description mentions Oh My Pi
• CHANGELOG has an Unreleased OMP entry

Technical approach

• Follows the existing parser contract: parseOmpSessions() and extractOmpContext().
• Uses shared JSONL helpers instead of loading session files wholesale.
• Uses scanJsonlHead for cheap metadata discovery and readJsonlFile only during full context extraction.
• Uses SummaryCollector and existing summarizer helpers instead of OMP-specific markdown formatting.
• Treats unknown/malformed records conservatively: skip what cannot be parsed, keep the session usable.
• Adds a regression test for lightweight recency because continues list/pick/quick-resume can use source indexes built without full transcript scans.

Files changed

File / area	Purpose
src/parsers/omp.ts	New OMP parser and handoff extractor.
src/parsers/registry.ts	Register OMP source, storage path, native resume, and cross-tool args.
src/types/tool-names.ts	Add omp to supported tool names and source union.
src/parsers/index.ts	Export OMP parser functions.
src/__tests__/omp-parser.test.ts	OMP discovery, extraction, and lightweight recency regression tests.
src/__tests__/fixtures/index.ts	Sanitized OMP fixture factory.
src/__tests__/unit-conversions.test.ts	Add OMP to source/target conversion matrix.
src/__tests__/schemas.test.ts	Update supported-tool schema expectations.
README.md, CHANGELOG.md, package.json	User-facing OMP support docs/metadata.

Testing

Automated checks:

• corepack pnpm@10 run build
• corepack pnpm@10 test
  • 29 test files passed
  • 984 tests passed
  • 2 skipped
• npx -y node@22 node_modules/vitest/vitest.mjs run
  • verifies the suite under the CI Node 22 runtime
  • 29 test files passed
  • 984 tests passed
  • 2 skipped

E2E smoke against real local OMP data:

• npm run dev -- scan --rebuild
  • found OMP sessions
• npm run dev -- list --source omp --json -n 1
  • returned a real OMP session from ~/.omp/agent/sessions/...jsonl
• npm run dev -- resume 019f6a82 -i codex --debug-prompt --no-tui
  • generated a Codex handoff from an OMP session

Review pass:

• Ran an internal reviewer pass before opening the PR.
• Reviewer found one correctness issue: lightweight OMP indexing could order sessions by stale timestamps.
• Added a failing regression test first, then fixed timestamp handling to keep updatedAt monotonic.

Risks / reviewer focus

1. OMP schema drift — parser is tolerant, but new record shapes may need follow-up coverage.
2. Tool result pairing — tool summaries depend on tool_execution_start and later toolResult messages sharing toolCallId; missing results still produce conservative summaries.
3. Native resume contract — assumes omp --resume <id> is the right CLI shape.
4. Cross-tool prompt contract — assumes OMP accepts the handoff prompt as a positional message argument.

Follow-ups

• Add parser-documentation pages for OMP storage/message/tool-call formats if this repo wants docs parity with older tools.
• Add live sanitized OMP fixture samples if the project prefers fixtures copied from real sessions over synthetic records.

---

Summary by cubic

Adds Oh My Pi (OMP) as a first-class source: we discover, parse, and extract handoffs from OMP JSONL sessions and support native resume. This brings supported tools to 17 and updates docs accordingly.

• New Features

  • OMP session discovery and parsing from $PI_CODING_AGENT_DIR/sessions/ (default ~/.omp/agent/sessions/), with lightweight recency ordering.
  • Context extraction: recent messages, tool calls/results, model notes, token/cache usage, thinking level, and lifecycle; handoff markdown and timeline included.
  • Registry/CLI integration: new omp source with list/inspect/dump; native resume via omp --resume <id> and cross-tool handoff.
  • Tests and fixtures: new omp fixtures and parser tests; e2e/unit paths updated across sources.
  • Docs and metadata updated (README.md, CHANGELOG.md, package.json); minor lint and import path cleanups.

• Migration

  • No changes required. Optionally set PI_CODING_AGENT_DIR; otherwise the default ~/.omp/agent/sessions/ is used.
  • Try it: continues list --source omp -n 1 and continues resume <id> -i codex

^{Written for commit 80db52a. Summary will update on new commits.}