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[GP4-S5] App-Safe Missing Retention Semantics #573

Description

@flyingrobots

Roadmap slice: GP4-S5
Goalpost: Goalpost 4: Retained Evidence Durability
Parent: #519
Related: #512, #513, #517, #522

Source: docs/design/wal-wsc-durability-roadmap.md on branch cycle/521-wal-wsc-storage-relationship at bde7957c.

Scope

Parent issues:
#519,
#517.

Scope:

  • Ensure app-safe readings and outcomes report missing retention as typed
    obstruction/posture, not empty success.

Acceptance:

  • Missing reading payload bytes return missing-retention posture.
  • Missing reading envelope bytes return missing-retention posture.
  • Missing receipt evidence does not erase the applied/rejected causal outcome;
    it reports unavailable support material.

Witness:

cargo test -p warp-core retained_reading_missing_payload_is_not_empty_success

Dedupe note

This is the PR-sized implementation slice for the roadmap item above. Existing umbrella or adjacent issues remain linked as Parent/Related rather than duplicated here.

Activity

  1. coderabbitai commented on Jun 19, 2026

    @coderabbitai
    Contributor
    🔗 Related PRs

    #319 - [codex] Harden reading artifact posture [merged]
    #323 - Witnessed suffix admission evaluator [merged]
    #371 - feat(core): advance v0.1 contract evidence and retention [merged]
    #379 - feat(core): commit runtime WAL ACK evidence [merged]
    #380 - feat(core): expose retained evidence posture on readings [merged]


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  2. modified the milestones: , Echo 1.0 on Jun 20, 2026
  3. moved this from Todo to In Progress in Continuum Stack Convergenceon Jun 28, 2026
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