Notion AI has no public inference API (see closed request #3272), so this
adds it as a new entry in the established web-cookie provider category
(chatgpt-web, claude-web, grok-web, ...): cookie-based auth via the
token_v2 session cookie posted to Notion's undocumented internal
POST /api/v3/runInferenceTranscript endpoint, translating its NDJSON
transcript-patch stream into OpenAI-compatible chat completions.
- NotionWebExecutor (open-sse/executors/notion-web.ts): resolves the
token_v2 cookie (+ optional space_id/notion_browser_id), builds a
Notion transcript from the chat messages, parses the NDJSON response
(cumulative-snapshot semantics, mirroring gemini-web.ts's handling of
#7163), and returns a chat.completion or pseudo-streamed SSE response.
All error paths route through makeExecutorErrorResult (sanitized).
- RegistryEntry under open-sse/config/providers/registry/notion-web/,
registered in providers/index.ts REGISTRY and executors/index.ts
(alias "nw").
- WEB_COOKIE_PROVIDERS entry (src/shared/constants/providers/web-cookie.ts)
with subscriptionRisk + webCookie risk notice, clearly labeled
"(Unofficial/Experimental)".
- Cookie-probe validator (validateNotionWebProvider) against Notion's
getSpaces endpoint, and a webSessionCredentials.ts UI entry for the
"Add session cookie" flow.
- Regenerated docs/reference/PROVIDER_REFERENCE.md and the
provider/translate-path golden snapshot (purely additive diffs); synced
the "251 providers" count across README/AGENTS/CLAUDE.md
(check:docs-counts STRICT gate).
Tests: tests/unit/executor-notion-web.test.ts (22 cases — registry
consistency, mocked-upstream request/response translation, NDJSON
snapshot parsing, cookie resolution, sanitized error paths) plus the
existing executor-web-cookie-sweep, provider-alias-uniqueness,
check-provider-consistency, web-session-credentials, and
provider-translate-path-golden suites all pass with notion-web included.
