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multica/server
Multica Eve 8d0ea04fb0 feat(composio): add standalone Go SDK client (MVP) (#4603)
* feat(composio): add standalone Go SDK client (MVP)

Adds server/pkg/composio — a self-contained Go SDK for the Composio v3.1
REST API. Built on go-resty/resty v2; zero coupling to other Multica
packages so it can be vendored or extracted later without surgery.

MVP surface (just the endpoints Stage 2 needs):

- POST /connected_accounts/link        Client.CreateLink
- POST /tool_router/session            Client.CreateSession
- GET  /connected_accounts             Client.ListConnectedAccounts
- POST /connected_accounts/{id}/revoke Client.RevokeConnection
- DELETE /connected_accounts/{id}      Client.DeleteConnectedAccount
                                       (404 -> nil, idempotent)
- GET  /toolkits                       Client.ListToolkits
- GET  /toolkits/{slug}                Client.GetToolkit
- POST /tools/execute/{slug}           Client.ExecuteTool
- Webhook HMAC-SHA256 verification     composio.VerifyWebhook /
                                       VerifyHTTPRequest + ParseEvent

Other notes:

- Auth via x-api-key header (Composio v3.1 contract).
- Typed *APIError envelope with IsNotFound / IsUnauthorized /
  IsRateLimited helpers; falls back to raw body when upstream returns
  non-JSON.
- Webhook signature accepts the official "v1,<sig>" format and any
  comma-separated multi-version list; 300s replay tolerance by default,
  honors an injectable clock for tests; RFC3339 timestamps tolerated.
- README.md documents all public APIs and design choices.

Tests:

- All exercise httptest.NewServer - no real Composio calls.
- 36 tests covering happy paths, validation, 404 idempotence, error
  decoding, signature verify (good / tampered / stale / multi-version /
  bare / RFC3339 / missing headers / empty secret).
- go test ./pkg/composio/... -cover -> 82.2%, exceeds the >=80% bar.

Follow-ups (separate PRs):

- server/internal/integrations/composio - DB schema, REST handlers,
  registration_service (CSRF), dispatch hook (MUL-3720 remainder).
- Pagination iterators, retry middleware, proxy execute, triggers.

Refs: MUL-3720, MUL-3715
Co-authored-by: multica-agent <github@multica.ai>

* fix(composio): align SDK with v3.1 wire contract (PR #4603 review)

Addresses GPT-Boy's review on PR #4603:

Must-fix
- ListConnectedAccountsRequest: switch UserID/AuthConfigID singular fields
  to plural slices (UserIDs, AuthConfigIDs, ToolkitSlugs, ConnectedAccountIDs,
  Statuses). The Composio v3.1 spec ships these as `*_ids` array params;
  our singular form silently dropped the user-filter on the wire. Also
  surfaces order_by / order_direction / account_type from the same spec.
- ExecuteToolRequest: rename ToolkitVersions -> Version with json tag
  `version` (the actual v3.1 body field). Marks AllowTracing as
  deprecated per the spec.

Nits
- ListToolkitsRequest.SortBy comment: `popular | alphabetical` -> the
  real enum `usage | alphabetically`.
- Client constructor: when Options.HTTPClient is provided, use
  resty.NewWithClient(hc) so the caller's Transport, Jar, CheckRedirect,
  and Timeout all carry through — the prior code only forwarded
  Transport + Timeout despite the field comment promising the full
  *http.Client.

Tests
- TestListConnectedAccounts_QueryString now asserts plural query keys
  (user_ids, auth_config_ids, connected_account_ids, statuses) and
  explicitly guards that the legacy singular keys do not leak.
- TestExecuteTool_Success decodes the body as a raw map and asserts the
  wire key is `version` (not `toolkit_versions`).
- New TestExecuteToolRequest_VersionSerialization locks the json tag.
- New TestNewClient_HonorsInjectedHTTPClient drives a request through a
  recordingTransport and asserts the inbound *http.Client actually
  handled it.

Verification
- go test ./pkg/composio/... -cover -> 85.1% (38 tests; was 82.2% / 36).
- go vet, go build, gofmt -l all clean.

Refs: PR #4603 review, MUL-3720
Co-authored-by: multica-agent <github@multica.ai>

---------

Co-authored-by: Eve <eve@multica-ai.local>
Co-authored-by: multica-agent <github@multica.ai>
2026-06-26 15:07:47 +08:00
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