# TP-162: Codex Streamable HTTP JSON-RPC smoke coverage — Status

**Current Step:** Step 4: Documentation & Delivery
**Status:** ✅ Complete
**Last Updated:** 2026-06-10
**Review Level:** 2
**Review Counter:** 8
**Iteration:** 1
**Size:** M

---

### Step 0: Preflight
**Status:** ✅ Complete

- [x] Required files and paths exist
- [x] Dependencies satisfied

---

### Step 1: Add Streamable HTTP JSON-RPC handshake smoke tests
**Status:** ✅ Complete

- [x] Initialize response envelope test added
- [x] Ping response envelope test added
- [x] Raw in-process HTTP wire assertions parse JSON or SSE `data:` envelopes instead of SDK-decoded results
- [x] Handshake lifecycle covers initialize, `notifications/initialized` with session ID, then ping using Codex-like headers
- [x] Success assertions reject bare payloads and top-level errors before inspecting `result`
- [x] R003 revision: success envelope assertions fail whenever a top-level `error` member is present, even `null`
- [x] Codex-like HTTP headers covered without external process
- [x] Targeted MCP tests pass

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### Step 2: Fix transport/protocol behavior only if tests fail
**Status:** ✅ Complete

- [x] Transport/server fixes applied if needed
- [x] Stdio and loopback defaults preserved
- [x] Protocol errors remain short/actionable
- [x] Targeted MCP tests pass

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### Step 3: Testing & Verification
**Status:** ✅ Complete

- [x] FULL test suite passing
- [x] Integration tests (if applicable)
- [x] All failures fixed
- [x] Build passes

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### Step 4: Documentation & Delivery
**Status:** ✅ Complete

- [x] `docs/clients/codex-local.md` reviewed/updated if affected
- [x] `CHANGELOG.md` updated
- [x] Discoveries logged

---

## Reviews

| # | Type | Step | Verdict | File |
|---|------|------|---------|------|
| R001 | Plan | 1 | REVISE | `.reviews/R001-plan-step1.md` |
| R002 | Plan | 1 | APPROVE | `.reviews/R002-plan-step1.md` |
| R003 | Code | 1 | REVISE | `.reviews/R003-code-step1.md` |
| R004 | Code | 1 | APPROVE | `.reviews/R004-code-step1.md` |
| R005 | Plan | 2 | APPROVE | `.reviews/R005-plan-step2.md` |
| R006 | Code | 2 | APPROVE | `.reviews/R006-code-step2.md` |
| R007 | Plan | 3 | APPROVE | `.reviews/R007-plan-step3.md` |
| R008 | Code | 3 | APPROVE | `.reviews/R008-code-step3.md` |

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## Discoveries

| Discovery | Disposition | Location |
|-----------|-------------|----------|
| Step 1 raw-wire smoke passed against the current Streamable HTTP transport, so Step 2 required no transport/server code change. | Verified with `go test ./internal/mcp`; preserve current `JSONResponse: false` SSE-compatible behavior. | `internal/mcp/transport.go`, `internal/mcp/protocol_test.go` |

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## Execution Log

| Timestamp | Action | Outcome |
|-----------|--------|---------|
| 2026-06-09 | Task staged | PROMPT.md and STATUS.md created |
| 2026-06-10 12:17 | Task started | Runtime V2 lane-runner execution |
| 2026-06-10 12:17 | Step 0 started | Preflight |
| 2026-06-10 12:17 | Step 0 completed | Required paths and Go module dependencies verified |
| 2026-06-10 12:17 | Step 1 started | Streamable HTTP JSON-RPC smoke tests |
| 2026-06-10 12:18 | Step 1 plan reviewed | R001 REVISE, R002 APPROVE after raw-wire checklist hydration |
| 2026-06-10 12:19 | Targeted MCP tests | `go test ./internal/mcp -run 'Streamable|JSONRPC|Codex|Protocol|Ping|Initialize'` passed |
| 2026-06-10 12:20 | Step 1 code reviewed | R003 REVISE addressed; R004 APPROVE |
| 2026-06-10 12:20 | Step 2 started | Transport/protocol behavior verification |
| 2026-06-10 12:21 | Step 2 plan reviewed | R005 APPROVE |
| 2026-06-10 12:21 | Step 2 transport fixes assessed | No transport/server changes needed after raw-wire tests and `go test ./internal/mcp` passed |
| 2026-06-10 12:22 | Step 2 code reviewed | R006 APPROVE |
| 2026-06-10 12:22 | Step 3 started | Testing and verification |
| 2026-06-10 12:23 | Step 3 plan reviewed | R007 APPROVE |
| 2026-06-10 12:23 | Full test suite | `make test` passed |
| 2026-06-10 12:23 | Integration tests | No separate integration target exists; in-process HTTP coverage included in `make test` |
| 2026-06-10 12:24 | Build | `make build` passed |
| 2026-06-10 12:24 | Step 3 code reviewed | R008 APPROVE |
| 2026-06-10 12:24 | Step 4 started | Documentation and delivery |
| 2026-06-10 12:25 | Documentation updated | Codex Streamable HTTP smoke coverage noted in client docs and changelog |
| 2026-06-10 12:25 | Task completed | All steps complete |
| 2026-06-10 12:43 | Worker iter 1 | done in 1559s, tools: 116 |
| 2026-06-10 12:43 | Task complete | .DONE created |

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## Blockers

*None*

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## Notes

Public signal: Montis forum #512 and #516-518 described Codex handshake failure until JSON-RPC 2.0 wrapping was strict.
R001 plan review requires raw in-process HTTP assertions against the wire response, parsing current SSE `data:` JSON-RPC envelopes if necessary, and a full initialize/initialized/ping session lifecycle with Codex-like headers.
R003 code review requires rejecting any top-level `error` member on successful JSON-RPC responses, including `error: null`.
| 2026-06-10 12:21 | Review R001 | plan Step 1: REVISE |
| 2026-06-10 12:23 | Review R002 | plan Step 1: APPROVE |
| 2026-06-10 12:29 | Review R003 | code Step 1: REVISE |
| 2026-06-10 12:32 | Review R004 | code Step 1: APPROVE |
| 2026-06-10 12:34 | Review R005 | plan Step 2: APPROVE |
| 2026-06-10 12:36 | Review R006 | code Step 2: APPROVE |
| 2026-06-10 12:38 | Review R007 | plan Step 3: APPROVE |
| 2026-06-10 12:41 | Review R008 | code Step 3: APPROVE |
