fix(slack): Handle stale history cursors#218
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Enable Slack's documented channel auto-linking behavior on outbound posts so bare channel references render as links without adding extra channel lookup API calls. Treat stale history cursors as recoverable tool errors instead of hard turn failures. This preserves the Slack API error context while guiding a retry from the newest page. Co-Authored-By: Codex GPT-5 <noreply@example.com>
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Remove the shared outbound link_names change and the explicit mrkdwn verbatim flags from reply blocks. The Slack docs confirm these parsing knobs broaden automatic mention handling, and forcing them at the boundary is too broad for normal assistant replies. This restores the prior request contract while keeping the stale cursor handling fix in place, so the PR addresses the review blockers without adding extra Slack API traffic or accidental notifications. Co-Authored-By: Codex GPT-5 <noreply@example.com>
dcramer
changed the title
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Handle stale Slack history cursors
Slack conversations.history can return invalid_cursor for expired cursors from earlier tool results. That currently fails the whole tool call and bubbles a raw Slack API failure into the turn. This change maps invalid_cursor into a recoverable tool result that tells the caller to retry from the newest page instead.
I initially explored Slack-side auto-linking for bare channel references in the same PR, but Slack's documented auto-parsing knobs broaden mention handling. That change was removed so this PR stays scoped to the verified cursor failure and does not add extra Slack API traffic.
Refs JUNIOR-1R