feat(sessions): port POST /api/sessions from open-agents

[sweetmantech]

Summary

Implements POST /api/sessions per the docs spec merged in recoupable/docs#186 + #187.

Creates a session row and an initial chat row. Rolls back the session if chat insert fails so callers never observe an orphaned session.

Stacked on PR #514

This PR depends on #514 (feat/port-get-session-route) for types/database.types.ts (regenerated to include sessions + chats) and lib/sessions/toSessionResponse.ts. Base is feat/port-get-session-route; once #514 lands in test, I'll flip the base.

Architecture

Following api conventions from CLAUDE.md:

• Route shell at app/api/sessions/route.ts delegates to createSessionHandler
• Validation via Zod (lib/sessions/validateCreateSessionBody.ts) returns the standard {status, missing_fields, error} 400 shape
• Supabase ops live in lib/supabase/sessions/ and lib/supabase/chats/ (one exported function per file)
• Auth via validateAuthContext (Privy Bearer or x-api-key)

TDD

Wrote tests first; verified red; implemented to green:

• 9 handler tests in lib/sessions/__tests__/createSessionHandler.test.ts
  • 401 unauth
  • 400 (sandboxType, repoOwner, repoName invalid)
  • 200 happy path: response shape + insert payload assertions
  • 200 with isNewBranch=true generates branch
  • 200 with provided title
  • 500 when insertSession fails (no chat insert attempted)
  • 500 with rollback when insertChat fails (deleteSessionById invoked)
• 1 thin route shell test

Out of scope

auto_commit_push_override, auto_create_pr_override, pr_number, pr_status — these columns don't exist on api's sessions table yet. Docs spec was trimmed in #187 to match. A follow-up database migration can add them later.

Test plan

• CI green
• Preview deployment: POST /api/sessions with x-api-key returns 200 + {session, chat}
• Same call without auth returns 401
• POST /api/sessions with {"sandboxType": "wrong"} returns 400
• After this lands, run end-to-end test: POST a session, then GET it via PR #514's endpoint to verify the full lifecycle

🤖 Generated with Claude Code

---

Summary by cubic

Adds POST /api/sessions to create a session and its first chat with auth, minimal validation, random-city title fallback, and rollback on failure (logs the orphaned id if rollback also fails). Also adds an OPTIONS preflight and disables caching; removes branch auto-generation and repo owner/name inputs.

• New Features

  • Implements POST /api/sessions returning { session, chat } (camelCase via toSessionResponse and toChatResponse).
  • Auth via validateAuthContext (Privy Bearer or x-api-key); 401 on failure. Body allows optional title, branch, cloneUrl, sandboxType=vercel; title resolves to trimmed input or a random city avoiding account collisions.
  • Adds OPTIONS handler with CORS and sets dynamic="force-dynamic", fetchCache="force-no-store", revalidate=0.

• Refactors

  • Centralizes request validation in validateCreateSessionBody (auth + tolerant JSON parse + Zod); returns either a 4xx response or { body, auth }.
  • Replaces readers with selectSessions({ id?, accountId? }); resolveSessionTitle uses it with defensive try/catch.
  • Extracts buildSessionInsertRow; standardizes 500 via failedToCreateSession; logs orphaned session id if chat insert and rollback both fail.
  • Removes branch auto-generation and repo owner/name inputs; scopes this PR to POST only.

^{Written for commit cb091b0. Summary will update on new commits.}

Summary by CodeRabbit

Release Notes

• New Features
  • Added session and chat creation API endpoint with full workflow support
  • Implemented automatic session naming using city-based fallback titles when custom titles are not provided
  • Added sandbox type configuration support for session initialization
  • Included comprehensive error handling with graceful rollback for failed operations
  • Enabled CORS support for cross-origin requests

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
api	Ready	Preview	May 4, 2026 11:22pm

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: ac7e4e73-55cc-441a-a62a-4986b7640db2

📥 Commits

Reviewing files that changed from the base of the PR and between 4adb35d and cb091b0.

⛔ Files ignored due to path filters (5)

• lib/sessions/__tests__/createSessionHandler.persistence.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/createSessionHandler.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/getRandomCityName.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/resolveSessionTitle.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/validateCreateSessionBody.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**

📒 Files selected for processing (4)

• lib/sessions/createSessionHandler.ts
• lib/sessions/resolveSessionTitle.ts
• lib/sessions/validateCreateSessionBody.ts
• lib/supabase/sessions/selectSessions.ts

📝 Walkthrough

Walkthrough

A new POST /api/sessions API route is introduced to create a session with an initial chat. The endpoint validates the request, resolves a title (user-provided or auto-generated from a curated city list), inserts the session and chat rows into Supabase, and returns both records with CORS headers.

Changes

Session & Chat Creation Flow

Layer / File(s)	Summary
Request Validation lib/sessions/validateCreateSessionBody.ts	Zod schema validates optional title, branch, cloneUrl, and sandboxType fields; returns 400 error response with field path and message on failure.
Title Fallback System lib/sessions/cityNames.ts, lib/sessions/getRandomCityName.ts, lib/sessions/resolveSessionTitle.ts	Curated city names list; random selection excludes previously used titles for the account; returns user-provided title if present, otherwise generates collision-free name.
Row Builders lib/sessions/buildSessionInsertRow.ts	Constructs a fully-formed sessions table row with UUID, lifecycle initialization, normalized fields from request body, and sandbox state defaults.
Database Operations lib/supabase/sessions/insertSession.ts, lib/supabase/sessions/deleteSessionById.ts, lib/supabase/sessions/selectSessionTitlesByAccountId.ts, lib/supabase/chats/insertChat.ts	Encapsulate Supabase CRUD for sessions (insert, delete, select) and chat insertion; log errors and return null/false on failure.
Response Transformation lib/sessions/toSessionResponse.ts, lib/sessions/toChatResponse.ts	Map snake\_case database columns to camelCase HTTP response payloads for both session and chat records.
Error Handling lib/sessions/failedToCreateSession.ts	Consistent 500 error response with CORS headers; used when session or chat insertion fails.
Handler & Route lib/sessions/createSessionHandler.ts, app/api/sessions/route.ts	createSessionHandler orchestrates the end-to-end flow: validate, resolve title, insert session and chat, rollback session on chat failure; OPTIONS and POST handlers in route with dynamic/no-store cache config.

Sequence Diagram

sequenceDiagram
    actor Client
    participant Route as API Route<br/>/api/sessions
    participant Handler as createSessionHandler
    participant Auth as Auth Validator
    participant Validator as Request Validator
    participant TitleResolver as Title Resolver
    participant SessionDB as Session DB Ops
    participant ChatDB as Chat DB Ops
    participant Transform as Response Transform

    Client->>Route: POST /api/sessions + body
    Route->>Handler: delegate to handler
    Handler->>Auth: validateAuthContext()
    Auth-->>Handler: accountId or error response
    Handler->>Validator: validateCreateSessionBody()
    Validator-->>Handler: CreateSessionBody or error response
    Handler->>TitleResolver: resolveSessionTitle(title, accountId)
    TitleResolver->>SessionDB: selectSessionTitlesByAccountId()
    SessionDB-->>TitleResolver: existing titles[]
    TitleResolver-->>Handler: resolved title
    Handler->>SessionDB: insertSession(buildSessionInsertRow(...))
    SessionDB-->>Handler: sessionRow or null
    Handler->>ChatDB: insertChat(newChatRow with sessionId)
    ChatDB-->>Handler: chatRow or null
    alt chat insert failed
        Handler->>SessionDB: deleteSessionById(sessionRow.id)
        SessionDB-->>Handler: true
        Handler-->>Route: 500 error response
    else chat insert succeeded
        Handler->>Transform: toSessionResponse(sessionRow)
        Transform-->>Handler: session payload
        Handler->>Transform: toChatResponse(chatRow)
        Transform-->>Handler: chat payload
        Handler-->>Route: 200 JSON {session, chat}
    end
    Route-->>Client: response + CORS headers

Loading

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🌍 From cities far, a session springs,
With chats in tow and titles bright,
One POST request, two rows of things,
And fallback names when users don't write. ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Solid & Clean Code	⚠️ Warning	Good SRP design but 4 unaddressed review issues: raw sessionId in logs (security), missing try-catch for DB failure, unchecked rollback, and deprecated Zod syntax.	Wrap DB call in try-catch, redact IDs in logs, check rollback result, use { error } instead of { message } in Zod schema.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/post-create-session

---

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[cubic-dev-ai]

3 issues found across 12 files

Confidence score: 3/5

• There is some merge risk because two validation helpers (lib/github/isValidGitHubRepoName.ts and lib/github/isValidGitHubRepoOwner.ts) are too permissive, which can let invalid GitHub owner/repo inputs pass and cause user-facing failures in downstream GitHub path handling.
• The most impactful issue is behavior correctness (not just style): accepting .git suffixes, dot-only names, and unsupported owner characters (. / _) can produce invalid repository targets at runtime.
• The test-file length issue in lib/sessions/__tests__/createSessionHandler.test.ts is mainly maintainability-related and is less likely to break functionality by itself.
• Pay close attention to lib/github/isValidGitHubRepoName.ts and lib/github/isValidGitHubRepoOwner.ts - tighten validation rules to match actual GitHub login/repository naming constraints.

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="lib/github/isValidGitHubRepoName.ts">

<violation number="1" location="lib/github/isValidGitHubRepoName.ts:9">
P2: `repoName` validation is too permissive: it accepts `.git`-suffixed and reserved dot-only names that are not valid GitHub repository path names.</violation>
</file>

<file name="lib/github/isValidGitHubRepoOwner.ts">

<violation number="1" location="lib/github/isValidGitHubRepoOwner.ts:1">
P2: Owner validation is too permissive and accepts characters GitHub owner logins do not allow (for example `.` and `_`).</violation>
</file>

<file name="lib/sessions/__tests__/createSessionHandler.test.ts">

<violation number="1" location="lib/sessions/__tests__/createSessionHandler.test.ts:1">
P2: Custom agent: **Enforce Clear Code Style and Maintainability Practices**

Test file exceeds the repository’s 100-line limit and should be split into smaller files.</violation>
</file>

Architecture diagram

sequenceDiagram
    participant Client as Client (Frontend/API Consumer)
    participant Route as POST /api/sessions (route.ts)
    participant Handler as createSessionHandler
    participant Auth as validateAuthContext
    participant Validator as validateCreateSessionBody (Zod)
    participant Branch as generateSessionBranchName
    participant SessionDB as sessions (Supabase)
    participant ChatDB as chats (Supabase)
    participant Response as toSessionResponse / toChatResponse

    Note over Client,Response: NEW: POST /api/sessions flow

    Client->>Route: POST /api/sessions (body: JSON)
    Route->>Handler: Delegates to handler

    Handler->>Auth: validateAuthContext(request)
    alt Auth fails (401)
        Auth-->>Handler: NextResponse 401
        Handler-->>Client: 401 Unauthorized
    else Auth succeeds
        Auth-->>Handler: { accountId, orgId, authToken }
    end

    Handler->>Handler: safeParseJson(request)
    Handler->>Validator: validateCreateSessionBody(body)
    alt Validation fails (400)
        Validator-->>Handler: NextResponse 400 (missing_fields, error)
        Handler-->>Client: 400 Bad Request
    else Validation succeeds
        Validator-->>Handler: validated body
    end

    opt isNewBranch === true
        Handler->>Branch: generateSessionBranchName()
        Branch-->>Handler: "ag/<8-hex-chars>"
    end

    Handler->>Handler: generateUUID() for sessionId

    Handler->>SessionDB: insertSession({ id, account_id, ... })
    alt Insert fails (500)
        SessionDB-->>Handler: null
        Handler-->>Client: 500 Failed to create session
    else Insert succeeds
        SessionDB-->>Handler: sessionRow
    end

    Handler->>ChatDB: insertChat({ id, session_id, title: "New chat" })
    alt Insert succeeds
        ChatDB-->>Handler: chatRow
        Handler->>Response: toSessionResponse(sessionRow)
        Handler->>Response: toChatResponse(chatRow)
        Response-->>Handler: CamelCase response payloads
        Handler-->>Client: 200 { session, chat }
    else Insert fails (500 with rollback)
        ChatDB-->>Handler: null
        Handler->>SessionDB: deleteSessionById(sessionRow.id)
        SessionDB-->>Handler: true/false
        Handler-->>Client: 500 Failed to create session
    end

Loading

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[sweetmantech]

SRP - make a validator function for this logic similar to other endpoints.

[sweetmantech]

YAGNI - why are branch names needed? I thought all commits were on the default branch.

[cubic-dev-ai]

0 issues found across 2 files (changes from recent commits).

_{Requires human review: Auto-approval blocked by 3 unresolved issues from previous reviews.}

[sweetmantech]

Addressed the review feedback:

• SRP (commit 93da2ac3) — extracted insert-row construction into lib/sessions/buildSessionInsertRow.ts so the handler only owns HTTP + persistence flow. New unit tests cover defaults, title trimming, whitespace fallback, and pass-through.
• YAGNI — deleted generateSessionBranchName and dropped isNewBranch from the validate schema. Sessions now commit to whatever branch the client supplies; the column defaults to false so we just don't write to it.
• Owner regex — tightened to GitHub's actual login rules: [a-zA-Z0-9-]+, 1–39 chars, no leading/trailing/consecutive hyphens, no _ or .. New unit test covers all rejection paths.
• Repo name regex — tightened: reject . and .., reject .git suffix (case-insensitive), cap at 100 chars.
• Test file size — split createSessionHandler.test.ts into two focused files (auth/validation + persistence) sharing fixtures via createSessionHandlerFixtures.ts. All test files now under 100 lines.

127 tests pass, lint clean.

[cubic-dev-ai]

2 issues found across 12 files (changes from recent commits).

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="lib/sessions/createSessionHandler.ts">

<violation number="1" location="lib/sessions/createSessionHandler.ts:18">
P2: Use a generic 500 message (`"Internal server error"`) instead of `"Failed to create session"` for internal failures.

(Based on your team's feedback about standardizing 500 responses to a hardcoded internal-error message.) [FEEDBACK_USED]</violation>
</file>

<file name="lib/sessions/__tests__/createSessionHandlerFixtures.ts">

<violation number="1" location="lib/sessions/__tests__/createSessionHandlerFixtures.ts:12">
P2: Custom agent: **Module should export a single primary function whose name matches the filename**

Module exports multiple top-level functions instead of a single primary export matching the filename.</violation>
</file>

_{Tip: Review your code locally with the cubic CLI to iterate faster.}

[sweetmantech]

Preview deployment test results

Tested against https://api-git-feat-post-create-session-recoup.vercel.app (commit 93da2ac3).

API key obtained via the documented signup flow:

curl -s -X POST "$PREVIEW/api/agents/signup" \
  -H 'Content-Type: application/json' \
  -d '{"email":"agent+post-create-session-test-'$(date +%s)'@recoupable.com"}'
# → { "account_id": "2db5cda8-8b1c-4c6d-87e9-ed8f10a9757a", "api_key": "recoup_sk_…" }

T1 — 401 no auth

POST /api/sessions
Content-Type: application/json

{}

HTTP/2 401
{"status":"error","error":"Exactly one of x-api-key or Authorization must be provided"}

✅ matches validateAuthContext envelope.

T2 — 400 invalid sandboxType

POST /api/sessions
x-api-key: recoup_sk_…

{"sandboxType":"wrong"}

HTTP/2 400
{"status":"error","missing_fields":["sandboxType"],"error":"Invalid sandbox type"}

✅ Zod rejects, error envelope matches api convention.

T3 — 400 underscore in repoOwner (tightened regex)

{"repoOwner":"snake_case"}

HTTP/2 400
{"status":"error","missing_fields":["repoOwner"],"error":"Invalid repository owner"}

✅ The pre-fix regex /^[.\w-]+$/ accepted this; tightened regex correctly rejects.

T4 — 400 dot in repoOwner (tightened regex)

{"repoOwner":"dot.case"}

HTTP/2 400
{"status":"error","missing_fields":["repoOwner"],"error":"Invalid repository owner"}

✅ same — tightened owner regex rejects ..

T5 — 400 .git suffix on repoName (tightened regex)

{"repoName":"repo.git"}

HTTP/2 400
{"status":"error","missing_fields":["repoName"],"error":"Invalid repository name"}

✅ pre-fix accepted; tightened version rejects .git suffix per GitHub's actual rules.

T6 — 400 reserved .. repoName (tightened regex)

{"repoName":".."}

HTTP/2 400
{"status":"error","missing_fields":["repoName"],"error":"Invalid repository name"}

✅ pre-fix accepted; tightened version rejects.

T7 — 200 happy path, empty body

POST /api/sessions
x-api-key: recoup_sk_…
Content-Type: application/json

{}

HTTP/2 200
{
  "session": {
    "id": "1af9a98e-c730-4484-875b-a7fa9bc18bf5",
    "userId": "2db5cda8-8b1c-4c6d-87e9-ed8f10a9757a",
    "title": "New session",
    "status": "running",
    "repoOwner": null, "repoName": null, "branch": null, "cloneUrl": null,
    "isNewBranch": false,
    "globalSkillRefs": [],
    "sandboxState": { "type": "vercel" },
    "lifecycleState": "provisioning",
    "lifecycleVersion": 0,
    "lastActivityAt": null, "sandboxExpiresAt": null, "hibernateAfter": null,
    "lifecycleRunId": null, "lifecycleError": null,
    "linesAdded": 0, "linesRemoved": 0,
    "snapshotUrl": null, "snapshotCreatedAt": null, "snapshotSizeBytes": null,
    "cachedDiff": null, "cachedDiffUpdatedAt": null,
    "createdAt": "2026-05-04T22:30:07.068391+00:00",
    "updatedAt": "2026-05-04T22:30:07.068391+00:00"
  },
  "chat": {
    "id": "77ee1e2f-f549-43c0-95b2-fcb3bed66f26",
    "sessionId": "1af9a98e-c730-4484-875b-a7fa9bc18bf5",
    "title": "New chat",
    "modelId": "anthropic/claude-haiku-4.5",
    "activeStreamId": null,
    "lastAssistantMessageAt": null,
    "createdAt": "2026-05-04T22:30:07.132005+00:00",
    "updatedAt": "2026-05-04T22:30:07.132005+00:00"
  }
}

Verified end-to-end:

• session.userId resolved from validateAuthContext (matches account_id of the API key's account)
• Session defaults applied as documented: status=running, lifecycleState=provisioning, sandbox_state.type=vercel, title="New session"
• chat.session_id = session.id (insert ordering correct, no orphan possible)
• chat.title = "New chat", chat.modelId = "anthropic/claude-haiku-4.5" (DB default — handler does not set it)
• All timestamps populated by Supabase (no last_activity_at / sandbox_expires_at / etc., as expected)

Test artifact

One session row remains in the preview's DB (id=1af9a98e-…, account_id=2db5cda8-…). No DELETE /api/sessions/[id] endpoint exists yet to clean up via API; can be removed via Supabase admin if needed.

Unit test suite (local)

127/127 passing, lint clean.

[sweetmantech]

YAGNI - Owner should always be recoupable. Why is this lib needed?

[sweetmantech]

SRP - new lib for failedToCreateSession.

[sweetmantech]

Real open-agents request vs api preview — head-to-head

Per request, captured the exact request the open-agents UI sends when a user creates a new session, then replayed it against this PR's preview deployment.

What the open-agents UI actually does

POST /api/sessions/personal HTTP/2
Authorization: Bearer <privy>
Content-Length: 0

Note: empty body, and the path is /api/sessions/personal, not /api/sessions — the UI flow uses a separate per-account-bootstrap endpoint that we have not built yet.

Side-by-side response shapes (same empty body)

Field	open-agents POST /api/sessions/personal	api preview POST /api/sessions
session.id	"YpiwAqlVkeQoFdTZ_uqpJ" (nanoid)	"b55da159-2d2a-4def-…" (UUID v4)
session.userId	"1WynZUAgzeNuOrxq7J7ot" (nanoid)	"2db5cda8-…" (UUID, recoup account_id)
session.title	"Vienna" (random city fallback)	"New session" (hardcoded default)
session.repoOwner	"recoupable" (auto-derived from account)	null
session.repoName	"-ed60e112-727a-4616-9a30-ed39dab1d0d7" (auto-derived from account id)	null
session.cloneUrl	"https://github.com/recoupable/-ed60e112-…" (derived)	null
session.autoCommitPushOverride	false	absent (trimmed per docs PR #187)
session.autoCreatePrOverride	false	absent (trimmed per docs PR #187)
session.prNumber / prStatus	null / null	absent (trimmed per docs PR #187)
chat.modelId	"openai/gpt-5.4"	"anthropic/claude-haiku-4.5" (DB default)
Top-level	{ session, chat, bootstrapPrompt }	{ session, chat }

What this means

This PR's POST /api/sessions matches the docs spec we merged, but it does not yet serve the open-agents frontend cutover — the UI calls a different endpoint with substantially different semantics. To actually replace /api/sessions/personal, we'd need to either:

1. Add POST /api/sessions/personal separately, with:
   • Auto-derive repoOwner = "recoupable" + repoName from accountId (needs an account → repo mapping)
   • cloneUrl derived from owner+name
   • Random-city title fallback when none provided
   • bootstrapPrompt in the response
2. Fold all of that into POST /api/sessions and rename / repurpose this endpoint — at which point the trimmed docs spec becomes wrong again.

Either way: this PR's current scope (generic POST /api/sessions with empty-body → minimal default session) is a real but distinct capability from what the frontend actually needs.

Two test artifacts left in the preview DB

Sessions 1af9a98e-… and b55da159-… (account 2db5cda8-…).

[cubic-dev-ai]

0 issues found across 15 files (changes from recent commits).

_{Requires human review: New API endpoint with database writes, rollback logic, and auth — significant feature addition requiring human review to verify correctness and production safety.}

[sweetmantech]

Real POST /api/sessions captured from open-agents (clone-from-URL flow)

Triggered the actual frontend code path via Chrome DevTools MCP — same body shape createBlankSession builds.

Request sent

{
  "cloneUrl": "https://github.com/recoupable/api.git",
  "isNewBranch": false,
  "sandboxType": "vercel",
  "autoCommitPush": false,
  "autoCreatePr": false
}

Open-agents response (200)

{
  "session": {
    "id": "d3U5esFUIKmO_ZqY948mU",
    "userId": "1WynZUAgzeNuOrxq7J7ot",
    "title": "Anchorage",
    "status": "running",
    "repoOwner": null,
    "repoName": null,
    "branch": null,
    "cloneUrl": "https://github.com/recoupable/api.git",
    "isNewBranch": false,
    "autoCommitPushOverride": false,
    "autoCreatePrOverride": false,
    "globalSkillRefs": [],
    "sandboxState": { "type": "vercel" },
    "lifecycleState": "provisioning",
    "lifecycleVersion": 0,
    "linesAdded": 0, "linesRemoved": 0,
    "prNumber": null, "prStatus": null
  },
  "chat": {
    "id": "eFD1TkdH0fE76J8t5tEPC",
    "sessionId": "d3U5esFUIKmO_ZqY948mU",
    "title": "New chat",
    "modelId": "openai/gpt-5.4"
  }
}

(No bootstrapPrompt — that field is only on /personal. Confirmed.)

Differences vs this PR's preview (same body, both endpoints POST /api/sessions)

Field	open-agents prod	api preview
session.title (no body title)	"Anchorage" (random city fallback)	"New session" (hardcoded)
session.cloneUrl	passed through ✓	passed through ✓
session.repoOwner / repoName	null ✓	null ✓
session.autoCommitPushOverride	false (from input)	absent (removed in docs PR #187)
session.autoCreatePrOverride	false (from input)	absent (removed in docs PR #187)
session.prNumber / prStatus	null / null	absent (removed in docs PR #187)
chat.modelId	"openai/gpt-5.4"	"anthropic/claude-haiku-4.5" (DB default)
ID format	nanoid	UUID v4

What this means for the cutover

Three input fields the real frontend sends today hit our preview and get silently stripped by Zod:

• isNewBranch — accepted-and-ignored, DB column already has default false
• autoCommitPush — accepted-and-ignored, DB column doesn't exist
• autoCreatePr — accepted-and-ignored, DB column doesn't exist

To actually cut the frontend over to api against this endpoint we'd need:

1. Database migration adding auto_commit_push_override, auto_create_pr_override (and pr_number, pr_status for completeness)
2. Restore those fields in docs (reverse the over-aggressive trim from feat: add CodeRabbit config with reviews for test branch #187)
3. Restore them here in the request schema + persist to the new columns
4. Title fallback: port the random-city helper or pick something deterministic

[sweetmantech]

UI-driven capture: head-to-head with this PR's preview

Re-ran the comparison properly. Clicked an actual org button in the open-agents UI to fire POST /api/sessions, captured the request via Chrome DevTools MCP, then replayed the byte-identical body against this PR's preview.

Identical request body sent to both endpoints

{
  "cloneUrl": "https://github.com/recoupable/org-delete-me-4c1f308f-9dd0-465d-97d2-4444ca1eaf4f",
  "isNewBranch": false,
  "sandboxType": "vercel",
  "autoCommitPush": true,
  "autoCreatePr": true
}

Open-agents production response (sandbox.recoupable.com/api/sessions)

{
  "session": {
    "id": "AstOUnR7blX1Dg4yBI4ry",
    "userId": "CHsKBglsX6elABy03yAYb",
    "title": "Philadelphia",
    "status": "running",
    "repoOwner": null, "repoName": null, "branch": null,
    "cloneUrl": "https://github.com/recoupable/org-delete-me-4c1f308f-9dd0-465d-97d2-4444ca1eaf4f",
    "isNewBranch": false,
    "autoCommitPushOverride": true,
    "autoCreatePrOverride": true,
    "globalSkillRefs": [],
    "sandboxState": { "type": "vercel" },
    "lifecycleState": "provisioning",
    "lifecycleVersion": 0,
    "linesAdded": 0, "linesRemoved": 0,
    "prNumber": null, "prStatus": null
  },
  "chat": {
    "id": "7FQ22wCcmDg8GI9xggK0y",
    "sessionId": "AstOUnR7blX1Dg4yBI4ry",
    "title": "New chat",
    "modelId": "openai/gpt-5.5"
  }
}

This PR's preview response (api-git-feat-post-create-session-recoup.vercel.app/api/sessions)

{
  "session": {
    "id": "01aab72d-1d1d-4214-9e37-6b9722d5cdc6",
    "userId": "2db5cda8-8b1c-4c6d-87e9-ed8f10a9757a",
    "title": "New session",
    "status": "running",
    "repoOwner": null, "repoName": null, "branch": null,
    "cloneUrl": "https://github.com/recoupable/org-delete-me-4c1f308f-9dd0-465d-97d2-4444ca1eaf4f",
    "isNewBranch": false,
    "globalSkillRefs": [],
    "sandboxState": { "type": "vercel" },
    "lifecycleState": "provisioning",
    "lifecycleVersion": 0,
    "lastActivityAt": null, "sandboxExpiresAt": null, "hibernateAfter": null,
    "lifecycleRunId": null, "lifecycleError": null,
    "linesAdded": 0, "linesRemoved": 0,
    "snapshotUrl": null, "snapshotCreatedAt": null, "snapshotSizeBytes": null,
    "cachedDiff": null, "cachedDiffUpdatedAt": null
  },
  "chat": {
    "id": "0d0afe2d-1586-451e-b390-c75544d2b00a",
    "sessionId": "01aab72d-1d1d-4214-9e37-6b9722d5cdc6",
    "title": "New chat",
    "modelId": "anthropic/claude-haiku-4.5"
  }
}

Field-by-field divergence (same input)

Field	open-agents	this PR	Cause
session.id	nanoid "AstOUnR7blX1Dg4yBI4ry"	UUID v4 "01aab72d-…"	We use generateUUID().
session.userId	nanoid (open-agents user pk)	UUID (recoup account_id)	Different identity systems.
session.title	"Philadelphia" (random city)	"New session" (hardcoded)	We didn't port the random-city helper.
session.cloneUrl	passed through ✓	passed through ✓	matches
session.autoCommitPushOverride	true (echoed from input)	absent	Removed in docs PR #187; Zod silently strips.
session.autoCreatePrOverride	true (echoed from input)	absent	Same.
session.prNumber / prStatus	null / null	absent	Removed in docs PR #187.
chat.modelId	"openai/gpt-5.5" (account preference)	"anthropic/claude-haiku-4.5" (DB default)	We don't read account preferences.

How the request was triggered (UI path)

1. Logged into sandbox.recoupable.com as an account belonging to multiple orgs (so the org-selector UI shows instead of auto-creating personal).
2. Clicked the "delete me" org button on /sessions.
3. Captured reqid=703 via Chrome DevTools MCP list_network_requests + get_network_request. That's the request body shown above.
4. Replayed the captured body verbatim against this PR's preview with an x-api-key (issued via POST /api/agents/signup).

Conclusion

This PR's preview accepts the request and returns the right top-level structure ({session, chat}), but it's:

• Missing 4 response fields the frontend reads: autoCommitPushOverride, autoCreatePrOverride, prNumber, prStatus
• Silently stripping 2 input fields with nowhere to land: autoCommitPush, autoCreatePr (no DB columns)

Cutover blockers:

1. Database migration adding auto_commit_push_override, auto_create_pr_override, pr_number, pr_status columns
2. Revert the over-aggressive trim from docs PR feat: add CodeRabbit config with reviews for test branch #187 (restore those 4 response fields + 2 input fields in the OpenAPI spec)
3. Restore in this PR's request schema + persist to the new columns
4. Optional: port getRandomCityName so default titles match "Philadelphia"-style instead of "New session"

[sweetmantech]

SRP

• actual: validateAuthContext called in the handler
• required: move validateAuthContext to inside of validateCreateSessionBody

[sweetmantech]

SRP

• actual: safeParseJson called in the handler
• required: move safeParseJson to inside of validateCreateSessionBody

[sweetmantech]

DRY

• actual: 2 supabase libs to query select on sessions.
• required: 1, general selectSessions lib which can be called in both usages.

[cubic-dev-ai]

1 issue found across 14 files (changes from recent commits).

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="lib/sessions/__tests__/getRandomCityName.test.ts">

<violation number="1" location="lib/sessions/__tests__/getRandomCityName.test.ts:29">
P2: This test can pass without verifying the suffix behavior. Add a failing assertion after the loop so the spec fails when the expected suffixed city is never generated.</violation>
</file>

_{Tip: Review your code locally with the cubic CLI to iterate faster.}

[coderabbitai]

Actionable comments posted: 4

🧹 Nitpick comments (4)

lib/supabase/sessions/deleteSessionById.ts (1)

11-20: ⚡ Quick win

Return a typed DB result instead of boolean.

For Supabase data helpers, boolean loses useful context and diverges from the typed result convention. Returning a typed session row (or null) gives callers better rollback/error handling semantics and keeps contracts consistent.

As per coding guidelines, "lib/supabase/**/*.ts: Return typed results using Tables<"table_name">."

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@lib/supabase/sessions/deleteSessionById.ts` around lines 11 - 20, The
function deleteSessionById currently returns a plain boolean; change it to
return the typed deleted session row (or null) using the Tables<"sessions"> type
so callers get the deleted record and consistent typing. Update the signature of
deleteSessionById to return Promise<Tables<"sessions"> | null>, call
supabase.from("sessions").delete().eq("id", id).select().single() (or select()
and grab first element) and on success return the deleted row (data) or null if
none; on error log and return null. Ensure the function references the
Tables<"sessions"> type in its return annotation and uses the supabase
delete().select() result rather than a boolean.

lib/sessions/cityNames.ts (1)

7-198: ⚡ Quick win

Align this module with the file-function export rule.

This file currently exports only a constant; repo rules require a primary exported function with filename alignment. Please move this list behind a function export in a function-named file (or colocate with the consumer if that better fits module boundaries).

As per coding guidelines, "**/*.{js,ts,tsx,jsx}: File-function name match: each file must export ONE primary function, and the file name must match that function's name."

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@lib/sessions/cityNames.ts` around lines 7 - 198, The module currently only
exports the readonly constant cityNames which violates the file-function export
rule; wrap the array behind a single primary exported function whose name
matches the file (e.g., export function cityNames() or export default function
cityNames()) and keep the existing array as an internal const (e.g., const
CITY_NAMES = [...]) returned by that function; update any consumers to call the
function (cityNames()) instead of importing the constant or move the array into
the module that already exports a primary function to satisfy the rule.

lib/supabase/sessions/selectSessionTitlesByAccountId.ts (1)

11-23: ⚡ Quick win

Use a table-derived return type for titles.

Promise<string[]> works today, but it decouples this helper from schema typing. Returning an array typed from Tables<"sessions">["title"] keeps compile-time protection if the column type changes.

As per coding guidelines, "lib/supabase/**/*.ts: Return typed results using Tables<"table_name">."

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@lib/supabase/sessions/selectSessionTitlesByAccountId.ts` around lines 11 -
23, Update selectSessionTitlesByAccountId to return the column-typed array
rather than a raw string[]: change the declared return type Promise<string[]> to
Promise<Array<Tables<"sessions">["title"]>> (or the equivalent using
Tables<"sessions">["title"][]), adjust the supabase query typing if needed so
the data is inferred as Array<Pick<Tables<"sessions">, "title">> or similar, and
ensure the final return maps rows to the typed title values while preserving the
same runtime behavior; reference the function name
selectSessionTitlesByAccountId and the type Tables<"sessions">["title"] when
making the change.

lib/sessions/toSessionResponse.ts (1)

16-16: 💤 Low value

userId violates the account terminology convention.

The field name userId conflicts with the project's naming guideline ("Use 'account' terminology, never 'entity' or 'user'"). Even though this is intentional for open-agents wire-format compatibility (as the JSDoc explains), the divergence should be tracked — either by adding an explicit // wire-compat: open-agents expects "userId" inline annotation, or by filing a follow-up to align the frontend field name with accountId once the cutover window opens.

As per coding guidelines: "Use 'account' terminology, never 'entity' or 'user'".

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@lib/sessions/toSessionResponse.ts` at line 16, The assignment of userId in
toSessionResponse (userId: row.account_id) violates the project-wide "account"
terminology; add an inline annotation to explicitly document the intentional
divergence for open-agents wire-format compatibility (e.g., add a comment like
// wire-compat: open-agents expects "userId" next to the userId field in
toSessionResponse) and also create/file a follow-up task to migrate the frontend
to accountId when the cutover window opens so the divergence is tracked and can
be removed later.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@lib/sessions/createSessionHandler.ts`:
- Around line 61-64: When chatRow is missing the rollback call to
deleteSessionById(sessionRow.id) currently ignores its Promise<boolean> result;
change it to capture the result (e.g., const deleted = await
deleteSessionById(sessionRow.id)) and if deleted is false, emit an observability
signal (log an error including sessionRow.id and context and/or report to
telemetry/Sentry) before returning failedToCreateSession() so failed deletions
are visible and diagnosable.

In `@lib/sessions/resolveSessionTitle.ts`:
- Around line 27-28: Wrap the call to selectSessionTitlesByAccountId inside a
try-catch in resolveSessionTitle (or wherever the call is made) so transient DB
errors are swallowed: on success use the returned titles, on any thrown error
log or warn with context and proceed with an empty Set to pass into
getRandomCityName; this preserves deduplication when the DB is healthy but falls
back to non-deduplicated city-name generation on DB failures.

In `@lib/sessions/validateCreateSessionBody.ts`:
- Line 9: Update the Zod literal schema for sandboxType to use the Zod v4 error
param: replace the deprecated { message: "Invalid sandbox type" } with { error:
"Invalid sandbox type" } in the z.literal(...) call (the symbol to change is
sandboxType defined via z.literal). Ensure any similar uses of { message: ... }
in validateCreateSessionBody.ts are migrated to { error: ... } as well.

In `@lib/supabase/sessions/selectSession.ts`:
- Around line 18-20: In selectSession, avoid logging the raw sessionId on error;
change the error handling where it currently consoles the sessionId and error
(the block using sessionId and error) to log a redacted or truncated form of
sessionId (e.g., first N chars + ellipsis) and emit structured metadata instead
of embedding the full identifier in the message—include the redactedId and the
error object separately (or use a request/correlation id if available) so the
call site still has useful context without exposing the full resource
identifier.

---

Nitpick comments:
In `@lib/sessions/cityNames.ts`:
- Around line 7-198: The module currently only exports the readonly constant
cityNames which violates the file-function export rule; wrap the array behind a
single primary exported function whose name matches the file (e.g., export
function cityNames() or export default function cityNames()) and keep the
existing array as an internal const (e.g., const CITY_NAMES = [...]) returned by
that function; update any consumers to call the function (cityNames()) instead
of importing the constant or move the array into the module that already exports
a primary function to satisfy the rule.

In `@lib/sessions/toSessionResponse.ts`:
- Line 16: The assignment of userId in toSessionResponse (userId:
row.account_id) violates the project-wide "account" terminology; add an inline
annotation to explicitly document the intentional divergence for open-agents
wire-format compatibility (e.g., add a comment like // wire-compat: open-agents
expects "userId" next to the userId field in toSessionResponse) and also
create/file a follow-up task to migrate the frontend to accountId when the
cutover window opens so the divergence is tracked and can be removed later.

In `@lib/supabase/sessions/deleteSessionById.ts`:
- Around line 11-20: The function deleteSessionById currently returns a plain
boolean; change it to return the typed deleted session row (or null) using the
Tables<"sessions"> type so callers get the deleted record and consistent typing.
Update the signature of deleteSessionById to return Promise<Tables<"sessions"> |
null>, call supabase.from("sessions").delete().eq("id", id).select().single()
(or select() and grab first element) and on success return the deleted row
(data) or null if none; on error log and return null. Ensure the function
references the Tables<"sessions"> type in its return annotation and uses the
supabase delete().select() result rather than a boolean.

In `@lib/supabase/sessions/selectSessionTitlesByAccountId.ts`:
- Around line 11-23: Update selectSessionTitlesByAccountId to return the
column-typed array rather than a raw string[]: change the declared return type
Promise<string[]> to Promise<Array<Tables<"sessions">["title"]>> (or the
equivalent using Tables<"sessions">["title"][]), adjust the supabase query
typing if needed so the data is inferred as Array<Pick<Tables<"sessions">,
"title">> or similar, and ensure the final return maps rows to the typed title
values while preserving the same runtime behavior; reference the function name
selectSessionTitlesByAccountId and the type Tables<"sessions">["title"] when
making the change.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: dfaa31ac-aff6-42d6-ae97-e5ab18e833fd

📥 Commits

Reviewing files that changed from the base of the PR and between 97724c4 and 4adb35d.

⛔ Files ignored due to path filters (10)

• app/api/sessions/__tests__/route.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by app/**
• lib/sessions/__tests__/baseChatRow.ts is excluded by !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/baseSessionRow.ts is excluded by !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/buildSessionInsertRow.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/createSessionHandler.persistence.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/createSessionHandler.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/getRandomCityName.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/makeCreateSessionReq.ts is excluded by !**/__tests__/** and included by lib/**
• lib/sessions/__tests__/resolveSessionTitle.test.ts is excluded by !**/*.test.*, !**/__tests__/** and included by lib/**
• types/database.types.ts is excluded by none and included by none

📒 Files selected for processing (15)

• app/api/sessions/route.ts
• lib/sessions/buildSessionInsertRow.ts
• lib/sessions/cityNames.ts
• lib/sessions/createSessionHandler.ts
• lib/sessions/failedToCreateSession.ts
• lib/sessions/getRandomCityName.ts
• lib/sessions/resolveSessionTitle.ts
• lib/sessions/toChatResponse.ts
• lib/sessions/toSessionResponse.ts
• lib/sessions/validateCreateSessionBody.ts
• lib/supabase/chats/insertChat.ts
• lib/supabase/sessions/deleteSessionById.ts
• lib/supabase/sessions/insertSession.ts
• lib/supabase/sessions/selectSession.ts
• lib/supabase/sessions/selectSessionTitlesByAccountId.ts

[coderabbitai]

⚠️ Potential issue | 🟠 Major | ⚡ Quick win

A transient DB failure in title-lookup crashes the entire session creation request.

selectSessionTitlesByAccountId is not wrapped in a try-catch. If it throws (e.g., DB timeout, Supabase outage), the exception propagates through createSessionHandler — which also has no try-catch — and the caller gets a raw 500, even though the session could still be created with a degraded (non-deduplicated) city-name fallback.

The fix is to swallow the error and fall back to an empty set, preserving the happy path while still avoiding title collisions when the DB is healthy.

🛡️ Proposed fix: graceful degradation

-  const usedTitles = await selectSessionTitlesByAccountId(input.accountId);
-  return getRandomCityName(new Set(usedTitles));
+  let usedTitles: string[] = [];
+  try {
+    usedTitles = await selectSessionTitlesByAccountId(input.accountId);
+  } catch {
+    // Non-critical: fall back to an empty exclusion set so session creation
+    // can still proceed with a random city name (may collide, but won't block).
+  }
+  return getRandomCityName(new Set(usedTitles));

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	const usedTitles = await selectSessionTitlesByAccountId(input.accountId);
	return getRandomCityName(new Set(usedTitles));
	let usedTitles: string[] = [];
	try {
	usedTitles = await selectSessionTitlesByAccountId(input.accountId);
	} catch {
	// Non-critical: fall back to an empty exclusion set so session creation
	// can still proceed with a random city name (may collide, but won't block).
	}
	return getRandomCityName(new Set(usedTitles));

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@lib/sessions/resolveSessionTitle.ts` around lines 27 - 28, Wrap the call to
selectSessionTitlesByAccountId inside a try-catch in resolveSessionTitle (or
wherever the call is made) so transient DB errors are swallowed: on success use
the returned titles, on any thrown error log or warn with context and proceed
with an empty Set to pass into getRandomCityName; this preserves deduplication
when the DB is healthy but falls back to non-deduplicated city-name generation
on DB failures.

[sweetmantech]

Addressed the latest review:

SRP — handler now does one validation call. Folded safeParseJson and validateAuthContext into validateCreateSessionBody. The function now takes a NextRequest, returns either a 4xx NextResponse or { body, auth }. Handler is correspondingly thinner — one call, one short-circuit, then straight into title resolution + persistence.

DRY — single supabase reader for sessions. Replaced selectSession.ts (single-row by id) and selectSessionTitlesByAccountId.ts (titles by account) with one selectSessions({ id?, accountId? }) returning rows. resolveSessionTitle now projects to titles from the general fetch.

Tests:

• New validateCreateSessionBody.test.ts — 4 cases (auth-failure / 400 / success / malformed-JSON tolerance)
• Handler tests now mock the single validateCreateSessionBody instead of three separate functions
• resolveSessionTitle.test.ts mocks selectSessions instead of the deleted helper

23 unit tests pass, lint clean.

Note: deleting selectSession.ts here means PR #514's getSessionByIdHandler will need to switch its import to selectSessions({ id }).then(rows => rows[0] ?? null) when it rebases — flagging so neither of us forgets.

[cubic-dev-ai]

0 issues found across 10 files (changes from recent commits).

_{Requires human review: Auto-approval blocked by 1 unresolved issue from previous reviews.}

[sweetmantech]

Addressed the latest automated review (commit c7dff7c):

• Zod v4 migration ✓ — { message: "Invalid sandbox type" } → { error: "Invalid sandbox type" } on the sandboxType literal. v4 unified the error customization API.
• Orphan-session observability ✓ — when both insertChat and the session-rollback deleteSessionById fail, now logs [createSessionHandler] chat insert failed and session rollback failed — orphaned session: <id> so ops can find the leak. New test in createSessionHandler.persistence.test.ts asserts the log fires.
• selectSessions defensive try/catch ✓ — handles thrown exceptions (network-level rejection) as a fall-through to [] so a transient outage during title-lookup doesn't propagate up and 500 the whole create flow.
• getRandomCityName suffix-increment test ✓ — pinned Math.random to make the test deterministic. Previous loop could hit its cap without ever asserting.

Skipped: cubic-dev-ai's "don't log raw sessionId in selectSession.ts" — that file was deleted earlier in this PR (replaced by selectSessions).

24 unit tests pass, lint clean.

[cubic-dev-ai]

0 issues found across 5 files (changes from recent commits).

_{Requires human review: This PR adds a new API endpoint with database writes, auth, and business logic for session/chat creation. It's a significant feature (1394 lines) with non-trivial impact on data integrity and core API}

[cubic-dev-ai]

0 issues found across 1 file (changes from recent commits).

_{Requires human review: New API endpoint with database writes, rollback logic, and multiple new files. Even with thorough tests, this is a non-trivial feature that could impact data integrity and requires human review to vet}