Found during the Phase 5B pass-3 architectural audit: sanitizeModuleResponse's
Vary merge used a plain Set, so an existing "Vary: *" from a module handler
became "*, Origin, Cookie" (RFC 9110 §12.5.5 forbids combining "*" with any
other value), and a differently-cased existing token (e.g. "origin") produced
a redundant duplicate alongside the forced "Origin"/"Cookie". mergedVaryHeader
now de-duplicates case-insensitively, always emits canonical Origin/Cookie
casing, and collapses to a bare "*" whenever one is present, per focused unit
tests. The full app's own pre-existing cors() middleware (apps/api/src/app.ts,
unchanged here, present since Phase 4B on every /api/v1/* route including
/api/v1/principal) still unconditionally appends its own "Vary: Origin"
outside this module's control — noted in the new tests, not addressed by this
narrow fix.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
Phase 5B, pass 2: production API mounting, authorization enforcement,
and module-runtime lifecycle integration.
apps/api now discovers the installed module inventory exactly once
(prepareStartupModuleInventory), composes the platform permission
registry from it, starts the module runtime from that same discovered
list (startDiscoveredModuleRuntime, never rediscovering), and mounts
StartedModuleRuntime's published routes under
/api/v1/modules/<module-id> via a new apps/api-owned Hono adapter
(module-http-routes.ts). Every module route is protected by the
existing requirePermission middleware against the composed registry,
state-changing methods additionally require a trusted Origin, OPTIONS
remains entirely platform-owned, and a handler that throws, rejects,
or returns a non-Response becomes a fixed, sanitized
500 MODULE_HANDLER_FAILED. Module-supplied CORS headers are stripped
and every module response is forced to Cache-Control: no-store with
Vary: Origin, Cookie. RunningApi shutdown now stops the module runtime
between draining the HTTP server and closing the shared pool, and
every startup failure path stops the runtime and/or closes the pool
before propagating, without masking the original failure.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
