feat(slack_v2): read direct messages by user ID + deprecate List Messages - #21684
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…ages Iterated against the MCP eval suite (evals/slack_v2); this ships the fixes the evals surfaced. Suite green on Sonnet 5 (3/3, pass^2) after the change. - slack_v2.app.mjs: eval #36 ("read my DMs with myself") failed — the read tools forwarded a `U…` user id straight to conversations.history, which only accepts a conversation id and answered channel_not_found (writing to a DM already worked via chat.postMessage auto-open). Added openConversation() (conversations.open) and made resolveChannelId open the DM for a user id — the read-side counterpart to posting — so history, thread-replies, and reactions now accept a user id. Also made the id regexes case-sensitive (Slack ids are uppercase-only) so an all-alphanumeric lowercase channel NAME isn't misclassified as an id. #36 FAIL→PASS. [shared by 10 actions] - get-channel-history: description + `channel` prop now document reading a DM by user id. [minor] - list-messages: the legacy twin of Get Channel History was winning routing on the channel-read evals (#3/#25 warned expected_tools_missing, precision 0%). Renamed to "List Messages (Deprecated)" and steered to Get Channel History (name + first line are the tool-search retrieval key); run() unchanged, existing workflows still work. #3/#25/#36 → pass^2 3/3. [patch] - get-thread-replies, browse-files, set-channel-topic, get-channel-details, invite-user-to-channel, delete-message, add-reaction, edit-message, list-members-in-channel: version-only bumps for the shared resolveChannelId change. [patch] App package.json bumped 0.7.0 → 0.8.0. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Included review availability: Your plan includes up to 10 reviews per rolling hour; 6 remain after this review. 📝 WalkthroughWalkthroughSlack v2 adds user-ID resolution for direct messages through Slack’s ChangesSlack conversation actions
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to Direct-message resolution may pass the wrong participant to Slack when opening a conversation, causing read or write actions to fail or triggering unintended DM access behavior. This bounded correctness and permission risk should be fixed or explicitly accepted before merging. Sequence Diagram(s)sequenceDiagram
participant SlackAction
participant SlackV2App
participant SlackAPI
SlackAction->>SlackV2App: resolveChannelId(userId)
SlackV2App->>SlackAPI: conversations.open(users=userId)
SlackAPI-->>SlackV2App: conversation.id
SlackV2App-->>SlackAction: resolved conversation ID
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michelle0927
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Per-change rationale inline — each comment says what motivated the change. Suite + reconciliation in pd-connect-eval-monster/evals/slack_v2 (requirements.md).
| // This is the read-side counterpart to chat.postMessage accepting a user id: an agent | ||
| // asked to read "my DMs" resolves its own user id and passes it here, and history, | ||
| // thread replies, and reactions now accept it the way posting already does. | ||
| if (/^[UW][A-Z0-9]{8,}$/.test(input)) { |
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Why: eval #36 ("read my DMs with myself") failed — the read tools forwarded a U… user id straight to conversations.history, which only accepts a conversation id and answered channel_not_found. Writing to a DM already worked (chat.postMessage auto-opens the IM); reading had no equivalent. Change: a U…/W… user id now opens the DM idempotently (via the new openConversation() → conversations.open, line 1113) and resolves to the IM channel id, so history, thread-replies, and reactions accept a user id the way posting already did. The id regexes were also made case-sensitive (Slack ids are uppercase-only) so an all-alphanumeric lowercase channel name isn't misclassified as an id. Result: #36 FAIL→PASS (pass^2). Shared by 10 actions — backwards-compatible (previously-erroring inputs now work).
| type: "string", | ||
| label: "Channel", | ||
| description: "Channel ID (e.g. `C1234567890`) or channel name (e.g. `general` or `#general`). Resolved automatically.", | ||
| description: "Channel ID (e.g. `C1234567890`) or channel name (e.g. `general` or `#general`). For a direct message, pass a user ID (e.g. `U1234567890`) — including your own, to read your self-DM. Resolved automatically.", |
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Why: with DM reading now supported by resolveChannelId, the tool + prop needed to tell the agent it can pass a user id. Change: description and channel prop now document reading a DM by user id (including your own, for a self-DM). Result: the agent routes DM-read requests here and passes the user id. Minor bump (0.1.0→0.2.0): backwards-compatible capability + description.
| export default { | ||
| key: "slack_v2-list-messages", | ||
| name: "List Messages", | ||
| name: "List Messages (Deprecated)", |
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Why: this legacy twin of Get Channel History was winning tool-routing on the channel-read evals — #3/#25 warned expected_tools_missing and its precision was 0% — because it answers the same question but can't resolve names/DMs, has no fields param (oversized output), and its remote-options conversation prop breaks under MCP. Description tuning alone can't arbitrate two tools answering one question. Change: renamed to "List Messages (Deprecated)" and the description now leads with "DEPRECATED — use Get Channel History instead" (name + first sentence are the tool-search retrieval key); run() is unchanged so existing workflows calling it with a conversation id still work. Result: #3/#25/#36 → pass^2 3/3; the agent stops selecting this tool. Patch bump (copy only, no behavior change).
…e change The slack_v2.app.mjs change in this PR touches a shared dependency file, so CI's version check flags every component in the app. Patch-bump the remaining actions and sources (the resolveChannelId consumers were already bumped in the prior commit) to satisfy the check. No behavior change in these files. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Inline comments:
In `@components/slack_v2/slack_v2.app.mjs`:
- Around line 1297-1301: Update the self-DM resolution branch around
openConversation so authenticated user IDs are resolved through a non-creating
lookup using the existing direct-message conversation rather than passed as
users to conversations.open. Preserve creation behavior only if intentional;
otherwise keep the affected read-only actions free of write-scope requirements
and resolve the existing D-prefixed conversation.
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📒 Files selected for processing (13)
components/slack_v2/actions/add-reaction/add-reaction.mjscomponents/slack_v2/actions/browse-files/browse-files.mjscomponents/slack_v2/actions/delete-message/delete-message.mjscomponents/slack_v2/actions/edit-message/edit-message.mjscomponents/slack_v2/actions/get-channel-details/get-channel-details.mjscomponents/slack_v2/actions/get-channel-history/get-channel-history.mjscomponents/slack_v2/actions/get-thread-replies/get-thread-replies.mjscomponents/slack_v2/actions/invite-user-to-channel/invite-user-to-channel.mjscomponents/slack_v2/actions/list-members-in-channel/list-members-in-channel.mjscomponents/slack_v2/actions/list-messages/list-messages.mjscomponents/slack_v2/actions/set-channel-topic/set-channel-topic.mjscomponents/slack_v2/package.jsoncomponents/slack_v2/slack_v2.app.mjs
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What & why
AI-optimized slack_v2 read tools now support direct messages, hardened against the
eval suite in
pd-connect-eval-monster/evals/slack_v2. Reading a DM by user ID was theone gap left: writing to a DM already worked (chat.postMessage auto-opens the IM), but
the read tools forwarded a
U…user id straight to conversations.history, which onlyaccepts a conversation id and answered
channel_not_found.Changes (per component)
openConversation()(conversations.open);resolveChannelIdnow opens the DM for a
U…/W…user id (the read-side counterpart to posting) so history,thread-replies, and reactions accept a user id; id regexes made case-sensitive so a lowercase
channel name isn't misread as an id. Shared by 10 actions.
0.1.0→0.2.0, minor) — description +channelprop documentreading a DM by user id.
0.0.5→0.0.6, patch) — deprecated in favor of Get Channel History(it was winning routing on channel-read evals, precision 0%); renamed + steered,
run()unchanged so existing workflows still work.
invite-user-to-channel, delete-message, add-reaction, edit-message, list-members-in-channel
(patch) — version bumps for the shared
resolveChannelIdbehavioral change.Verification
evals/slack_v2— latest run 3/3 (pass^2, Sonnet 5).requirements.md: eval Typeform #36 FAIL→PASS; Improving readme #3/Airtable #25 routing fixed; safely get oauth tokens #22 was aneval bug (system
channel_joinmessage), criterion now accepts 33 or 34.🤖 Generated with Claude Code
Summary by CodeRabbit
New Features
Documentation
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