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‎1917-java-embed-rust-cli-runtime-remove-before-merge/shepherd-tasks-20260730-2141/20260730-2247-post-mortem.md‎

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# Post-Mortem Report: Shepherd-Task Run for Java Native Runtime Tasks
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**Campaign:** Java embedded Rust CLI runtime
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**Repository:** `github/copilot-sdk`
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**Base branch:** `edburns/1917-java-embed-rust-cli-runtime-dd-3039924-agentic-run-02`
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**Report generated:** 2026-07-30 22:47 UTC
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**Period covered:** 2026-07-30 21:41:15 UTC to 2026-07-30 22:47:07 UTC
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**Script exit code:** `1`
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## Table of Contents
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- [Section 1: Executive Summary](#section-1-executive-summary)
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- [Section 2: System Architecture](#section-2-system-architecture)
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- [2.1 Copilot Coding Agent (CCA)](#21-copilot-coding-agent-cca)
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- [2.2 Copilot Code Review Agent (CCRA)](#22-copilot-code-review-agent-ccra)
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- [2.3 Local Copilot CLI (Shepherd)](#23-local-copilot-cli-shepherd)
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- [Section 3: Per-Task Metrics](#section-3-per-task-metrics)
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- [3.1 - Issue #2169 / PR #2175](#31---issue-2169--pr-2175)
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- [3.2 - Unattempted Tasks](#32---unattempted-tasks)
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- [Section 4: Aggregate Statistics](#section-4-aggregate-statistics)
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- [Section 5: AI Credits and Token Usage](#section-5-ai-credits-and-token-usage)
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- [Section 6: Wall-Clock Timeline](#section-6-wall-clock-timeline)
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- [Section 7: Failure Analysis](#section-7-failure-analysis)
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- [Section 8: Observations and Recommendations](#section-8-observations-and-recommendations)
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---
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## Section 1: Executive Summary
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The serial shepherd run failed with exit code `1` after working only on [#2169](https://github.com/github/copilot-sdk/issues/2169) and its PR [#2175](https://github.com/github/copilot-sdk/pull/2175). No PR was merged, so campaign completion was 0/7 tasks (0%). The remaining six queued issues were not attempted.
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The run nevertheless produced resumable progress on [#2175](https://github.com/github/copilot-sdk/pull/2175). Phase 1 found two requirement gaps and timed out waiting 10 minutes for CCA to respond. Phase 2 then received one complete CCRA review with six comments, fixed and resolved all six threads, pushed head `d779d146b268f8efdf8bfcd65327b5f3fdca942c`, and completed post-fix CI successfully. It stopped because three attempts to request the mandatory second CCRA review were not acknowledged. The PR remained open and unmerged.
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| Metric | Value |
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|---|---:|
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| Target tasks | 7 |
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| Tasks attempted | 1/7 (14.3%) |
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| Tasks merged | 0/7 (0%) |
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| Tasks not attempted | 6 |
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| PRs touched | 1 |
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| Completed CCRA rounds | 1 |
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| CCRA comments generated | 6 |
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| Review threads resolved | 6 |
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| Total session time | 1h 05m 46s |
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| Local CLI output tokens | 25,652 |
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---
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## Section 2: System Architecture
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### 2.1 Copilot Coding Agent (CCA)
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CCA accepted [#2169](https://github.com/github/copilot-sdk/issues/2169), created draft PR [#2175](https://github.com/github/copilot-sdk/pull/2175), and implemented `NativeRuntimeLoader`. Phase 1 observed the CCA work-finished signal and then evaluated the implementation against the issue requirements.
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### 2.2 Copilot Code Review Agent (CCRA)
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CCRA reviewed all four changed files in [#2175](https://github.com/github/copilot-sdk/pull/2175) at head `a2b9815ea5f02bb737ef5b7f69bc1263d72afa85`. Review `4823679778`, submitted at 22:17:38 UTC, generated six top-level comments. A required second review at the fixed head was never acknowledged and therefore never completed.
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### 2.3 Local Copilot CLI (Shepherd)
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The local shepherd performed requirement validation, requested corrections, marked the PR ready, requested CCRA review, created an isolated worktree, applied review fixes, ran Java gates, pushed fixes, resolved review threads, and monitored CI. It failed closed rather than merging without a head-specific clean second review.
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---
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## Section 3: Per-Task Metrics
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| Issue | PR | Phase 1 | Phase 2 | CCRA rounds | Comments | Result |
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|---|---|---:|---:|---:|---:|---|
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| [#2169](https://github.com/github/copilot-sdk/issues/2169) | [#2175](https://github.com/github/copilot-sdk/pull/2175) | 31m 49s | 33m 57s | 1 completed | 6 | Failed; fixes pushed, not merged |
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| [#2146](https://github.com/github/copilot-sdk/issues/2146) | None | Not started | Not started | 0 | 0 | Skipped after prior failure |
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| [#2147](https://github.com/github/copilot-sdk/issues/2147) | None | Not started | Not started | 0 | 0 | Skipped after prior failure |
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| [#2148](https://github.com/github/copilot-sdk/issues/2148) | None | Not started | Not started | 0 | 0 | Skipped after prior failure |
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| [#2149](https://github.com/github/copilot-sdk/issues/2149) | None | Not started | Not started | 0 | 0 | Skipped after prior failure |
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| [#2150](https://github.com/github/copilot-sdk/issues/2150) | None | Not started | Not started | 0 | 0 | Skipped after prior failure |
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| [#2151](https://github.com/github/copilot-sdk/issues/2151) | None | Not started | Not started | 0 | 0 | Skipped after prior failure |
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### 3.1 - Issue [#2169](https://github.com/github/copilot-sdk/issues/2169) / PR [#2175](https://github.com/github/copilot-sdk/pull/2175)
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| Metric | Value |
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|---|---|
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| Task | Native binary extraction and caching |
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| Phase 1 outcome | Failed after requirement review |
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| Phase 1 failure | CCA did not push requested corrections within 10 minutes |
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| Initial CCRA review | 1 round; 4/4 files reviewed |
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| CCRA comments | 6 |
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| Threads resolved | 6/6 |
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| Final fix head | `d779d146b268f8efdf8bfcd65327b5f3fdca942c` |
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| Final reconciliation commit | `d779d146`; 2 files, 45 insertions, 158 deletions |
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| Targeted tests | 26 run; 0 failures; 0 errors |
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| Formatting gate | `spotless:apply` succeeded |
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| Post-fix CI | Completed successfully |
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| Phase 2 failure | Second CCRA review request not acknowledged after three attempts |
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| Final state | Open, fixes pushed, resumable, not merged |
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Phase 1 found that the initial implementation collapsed the explicit `COPILOT_CLI_PATH` override and bundled-CLI fallback, loaded version metadata before honoring the override, and lacked a deterministic atomic-publication failure test. CCA did not respond to the requested changes during the 10-minute wait.
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Phase 2 repaired the implementation and all six CCRA findings. The fixes restored the third resolution fallback, normalized the configured path, moved explicit override handling ahead of platform/version work, hardened temporary-file cleanup, added classifier-specific resource verification, and made invalid-cache repair atomic. The merge gate remained closed because no second review was recorded for the fixed head.
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### 3.2 - Unattempted Tasks
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The run artifacts contain no phase sessions or PRs for [#2146](https://github.com/github/copilot-sdk/issues/2146), [#2147](https://github.com/github/copilot-sdk/issues/2147), [#2148](https://github.com/github/copilot-sdk/issues/2148), [#2149](https://github.com/github/copilot-sdk/issues/2149), [#2150](https://github.com/github/copilot-sdk/issues/2150), or [#2151](https://github.com/github/copilot-sdk/issues/2151). The serial campaign stopped at the first task failure.
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---
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## Section 4: Aggregate Statistics
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| Metric | Value |
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|---|---:|
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| Phase sessions | 2 |
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| Phase 1 sessions | 1 |
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| Phase 2 sessions | 1 |
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| Attempted tasks | 1 |
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| Merged tasks | 0 |
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| Completed review rounds | 1 |
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| Review comments per attempted task | 6.0 |
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| Review comments per completed round | 6.0 |
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| Resolved-comment rate | 100% (6/6) |
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| Merge rate | 0% |
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| Time per attempted task | 1h 05m 46s |
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The available convergence evidence is mixed. Comment handling converged completely: all six first-round threads were fixed and resolved, targeted tests passed, and post-fix CI passed. Review convergence could not be measured because the second review request never entered an acknowledged state.
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---
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## Section 5: AI Credits and Token Usage
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| Session | Output tokens | Input tokens |
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|---|---:|---:|
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| Phase 1 | 5,311 | Unavailable |
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| Phase 2 | 20,341 | Unavailable |
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| **Total** | **25,652** | **Unavailable** |
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The JSON artifacts expose `assistant.message.outputTokens` but do not expose measured input-token totals. CCA and CCRA billing or credit consumption is also absent from the local artifacts.
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---
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## Section 6: Wall-Clock Timeline
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| Time (UTC) | Event |
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|---|---|
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| 21:41:15 | Phase 1 session started for [#2169](https://github.com/github/copilot-sdk/issues/2169) |
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| 21:41:29 | Issue assigned to CCA with the required base branch |
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| ~21:51 | CCA implementation cycle completed; requirement validation began |
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| ~22:02 | Shepherd requested resolution-order and atomic-publication corrections |
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| 22:13:05 | Phase 1 failed after no CCA push within 10 minutes |
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| 22:13:10 | Phase 2 started for [#2175](https://github.com/github/copilot-sdk/pull/2175) |
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| 22:17:38 | Initial CCRA review completed with six comments |
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| ~22:31 | Final targeted test run passed: 26 tests, no failures or errors |
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| ~22:31 | Fix head `d779d146` pushed; all six review threads resolved |
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| ~22:39 | Post-fix CI completed successfully |
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| 22:46:55 | Second-review request failed acknowledgement after three attempts |
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| 22:47:07 | Phase 2 ended; PR remained unmerged |
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The two phase sessions were nearly contiguous, producing an overall elapsed window of approximately 1h 05m 51s and 1h 05m 46s of recorded session duration.
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---
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## Section 7: Failure Analysis
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### 7.1 Immediate Failure
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The terminal failure was the unacknowledged second CCRA review request for [#2175](https://github.com/github/copilot-sdk/pull/2175) at fixed head `d779d146b268f8efdf8bfcd65327b5f3fdca942c`. Each `gh pr edit --add-reviewer Copilot` attempt exited `1` while reporting the Projects Classic GraphQL deprecation. The shepherd correctly did not rely only on that exit code: it checked for a new timeline request event, a pending `Copilot` review request, or a new head-specific review. None appeared after three attempts.
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### 7.2 Preceding Phase 1 Failure
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Phase 1 had already failed because CCA did not push corrections within its 10-minute response window. Despite this fail-closed result, phase 2 proceeded and marked the PR ready. This allowed the local shepherd to recover the implementation, but it crossed the intended phase boundary: phase 2 began from a PR that phase 1 explicitly declared not ready.
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### 7.3 Campaign-Level Impact
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Because tasks were processed serially and the script exited on the first unrecovered failure, [#2146](https://github.com/github/copilot-sdk/issues/2146), [#2147](https://github.com/github/copilot-sdk/issues/2147), [#2148](https://github.com/github/copilot-sdk/issues/2148), [#2149](https://github.com/github/copilot-sdk/issues/2149), [#2150](https://github.com/github/copilot-sdk/issues/2150), and [#2151](https://github.com/github/copilot-sdk/issues/2151) were never started. This is consistent with dependency-preserving fail-fast execution, but the run achieved no merged throughput.
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### 7.4 Resumability
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The failure did not discard the useful work. The fixed head is pushed, all known review threads are resolved, targeted tests and CI passed, and the PR remains open. Recovery should resume by obtaining a head-specific CCRA review, handling any new findings, rechecking CI and unresolved threads, and only then merging.
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---
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## Section 8: Observations and Recommendations
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### 8.1 What Worked
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- Requirement-level validation caught material gaps that green selector checks alone would not have found.
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- CCRA reviewed all changed files and produced six concrete findings.
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- The local shepherd resolved all six findings and preserved a review-to-fix audit trail.
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- Java tests, formatting, and post-fix CI completed successfully.
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- The merge gate failed closed when a clean review of the final head could not be proven.
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### 8.2 What Failed
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- CCA did not respond within the phase 1 correction window.
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- Phase 2 proceeded despite phase 1 declaring the PR unready.
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- The reviewer-request path depended on `gh pr edit`, whose GraphQL operation emitted a Projects Classic failure.
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- Three retries used the same request mechanism and produced no acknowledgement.
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- Serial fail-fast execution left six tasks untouched.
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### 8.3 Recommendations
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1. **Enforce the phase boundary.** The list orchestration should start phase 2 only after an explicit phase 1 success marker. If recovery from a failed phase 1 is intended, record it as a distinct recovery mode with its own gates rather than treating the PR as ready.
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2. **Add a reviewer-request fallback.** After the first unacknowledged `gh pr edit` attempt, switch to a supported API path for requesting Copilot review instead of repeating the same failing operation three times.
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3. **Capture acknowledgement diagnostics.** Persist the timeline-event count, pending-review-request state, completed-review count, command stderr, and request timestamps for every attempt.
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4. **Separate request and wait retry budgets.** A request transport failure should retry quickly or use a fallback; a successfully acknowledged request should receive the longer review-completion timeout.
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5. **Make campaign skips explicit.** On fail-fast exit, emit a machine-readable summary identifying the failed task, resumable PR/head, and every issue skipped because of serial dependency ordering.
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6. **Resume rather than restart [#2169](https://github.com/github/copilot-sdk/issues/2169).** Preserve head `d779d146b268f8efdf8bfcd65327b5f3fdca942c`, request a fresh CCRA review, and avoid reassigning CCA or recreating the existing fixes.
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