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## Thinking Path > - Paperclip helps people manage AI agents for work. > - Chat channels turn external messages into shared task workflows. > - The main service still contains some provider decisions. > - These decisions belong with the existing channel modules. > - This pull request isolates provider message-admission and runtime policies. > - Shared authorization, persistence, and runtime ownership keep their current order. ## Linked Issues or Issue Description Refs: #16235. Stack part 3/3. Base: `master`. #16276 and #16283 are merged. **What existing behavior does this improve?** Provider ownership and readability in the chat channel service. **Current behavior** The entry point combines shared workflows with provider decisions. **Proposed behavior** Provider modules own their decisions. Shared modules own product state and authorization. **Reason and benefit** Maintainers can find provider behavior in its channel folder. **Breaking changes** None intended. Public service methods and durable data shapes stay compatible. ## What Changed - Move Discord SDK admission and its barrier to the Discord message module. - Move Photon live-message eviction and startup recovery policy to its runtime callbacks module. - Move Slack mention eligibility and Teams setup-channel eligibility to their message modules. - Keep Photon deferred ingress and Speko conversation policy with their provider modules. - Keep ordered SDK message batching in a shared runtime module with a live per-message ingress callback. - Keep receiver leases, cache lifetime, startup failure cleanup, authorization locks, and transaction ownership shared. - Reduce `chat-channels.ts` from 3,570 to 3,548 lines. ## Verification - The same 46 runtime/admission integration cases and all 18 Photon channel cases passed before and after in the owned Linux container. - The existing first-channel Teams orphan-admission case passed before and after moving its eligibility predicate. - The same 94 SDK adapter and lifecycle-normalization tests passed locally. - Server typecheck and module-boundary checks passed. - Token comparison confirms ordered SDK batching and every processor argument, plus Photon invalidation and its live runtime lookup. - The shared factory creates no cache or worker. It reads the ingress policy for each message and awaits processing in order. - The extraction rebased without conflicts onto master after #16276 and #16283 merged. Git range-diff reports the same patch. Final head `7b63b569e2a0dbcc959310f565f77f367fa64aa0` has the same patch by range-diff. The 94 SDK/lifecycle tests, server typecheck, and boundary check passed on the final head. All CI gates pass on that exact head. Greptile reviewed it at 5/5 with no inline findings or unresolved review threads. - One Runner CI test failed its original short timing window. The unchanged test passed earlier-head CI and local reproduction. The single failed-job retry passed. - Cumulative `pnpm -r typecheck` and `pnpm build` passed. All 1,321 channel integration cases passed. The normal UI, CLI, database, adapter, plugin, and serialized API test selections ran. - The first Linux `pnpm test:run` returned 1. Original-source runs reproduced the local failures. Container-only repairs supplied missing tools, process reaping, and sufficient Node heap. The existing mocked-fetch CLI telemetry fixture passed with the image opt-out flag overridden only for that fixture. - One local venue limitation remains: adapter-utils T24 fails unchanged on both original and final source in the Linux container. Its entire 56-case suite passes before and after on the host. All other failed or aborted suites passed in repaired reruns. No test assertion or timeout changed. - These fixtures prove application integration. They do not prove live provider execution. ## Risks - A captured option value or changed callback order could affect deferred ingress or stale-runtime handling. - The ingress callback and runtime getter remain live. Core maps and receiver lease operations keep one owner. - No schema migration or public API change is included. ## Model Used OpenAI GPT-6, running in Codex with reasoning, tool use, and code execution. The exact deployment identifier and context-window size are not exposed in this session. ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with `Fixes: #` / `Closes #` / `Refs #` OR (b) described the issue in-PR following the relevant issue template - [x] I have not referenced internal/instance-local Paperclip issues or links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip` URLs) - [x] My branch name describes the change (e.g. `docs/...`, `fix/...`) and contains no internal Paperclip ticket id or instance-derived details - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [x] All Paperclip CI gates are green - [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge Co-authored-by: Paperclip <noreply@paperclip.ing>