v0.8.50: search

[waleedlatif1]

• fix(knowledge): give the reach count the probe's share of the deadline, not the leg's (fix(knowledge): give the reach count the probe's share of the deadline, not the leg's #8111)
• fix(knowledge): treat a reach of nothing as a bounded set of nothing (fix(knowledge): treat a reach of nothing as a bounded set of nothing #8113)
• fix(slack-search): align custom and shared app permissions (fix(slack-search): align custom and shared app permissions #8109)
• feat(knowledge): fill the projection source and ACL in shards (feat(knowledge): fill the projection source and ACL in shards #8112)

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Sep 21, 2026 7:35pm UTC

[greptile-apps]

Confidence Score: 4/5

The PR should not merge until the shard ranges cover boundary-valued text IDs; the Slack scope expansion should also be narrowed to reduce credential authority.

Findings

1.  Shard Boundaries Skip IDs ▶
2.   Custom Apps Gain Excess Privileges ▶

Summary

This PR adjusts access-scoped search reach counting, parallelizes the projection source/ACL backfill, and aligns custom and shared Slack manifests.

• Caps reach counting to the probe budget and treats a proven empty reach as a bounded empty set.
• Splits projection repair into tagged Trigger.dev shard chains and delays analysis/prewarming until all fillable rows are complete.
• Adds channel-picker bot scopes and gives custom Slack manifests the shared app’s broader permission sets.
• One shard-boundary gap can leave valid text IDs permanently unfilled, and the custom manifest expansion grants avoidable high-impact permissions.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  A[Operator starts projection backfill] --> B[Create one tagged chain per shard]
  B --> C[Fill semantic projection range]
  C --> D[Fill keyword projection range]
  D --> E{Any fillable rows remain?}
  E -->|Yes| F[End this shard without prewarming]
  E -->|No| G[Analyze projections]
  G --> H[Prewarm ranking pages]
  I[Search request] --> J[Probe permitted documents]
  J --> K[Count reach within probe budget]
  K -->|Count is zero| L[Bounded empty result]
  K -->|Count times out| M[Continue with unbounded search]
  K -->|Non-empty| N[Choose broad or narrow strategy]

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