feat: cache-memory cache_memory_miss detection and conclusion handler by Copilot · Pull Request #28516 · github/gh-aw

Copilot · 2026-04-25T22:31:10Z

Summary

Updates the built-in cache-memory prompt templates to instruct the agent to call the missing_data safe-output tool with data_type: "cache_memory" and reason: "cache_memory_miss" when it does not find expected data in the cache. The conclusion handler detects this signal and, when cache-memory is available, raises an agent failure issue/comment indicating a likely configuration problem (the prompt cannot locate the correct file path).

Changes

actions/setup/md/cache_memory_prompt.md and cache_memory_prompt_multi.md: Added <cache-miss-guidance> element instructing the agent to call missing_data with both data_type: "cache_memory" and reason: "cache_memory_miss" when the cache contains no data.
pkg/workflow/prompts/cache_memory_prompt.md and cache_memory_prompt_multi.md: Updated reference copies to match the runtime files.
pkg/workflow/notify_comment.go: Added GH_AW_CACHE_MEMORY_ENABLED: "true" to the agent failure step's env vars when cache-memory is configured, so the conclusion handler can verify availability.
actions/setup/js/handle_agent_failure.cjs:
- Reads new GH_AW_CACHE_MEMORY_ENABLED env var.
- Relaxed loadMissingDataMessages() to accept missing_data items that have only a reason (no data_type), using an empty string fallback — ensures cache-miss signals are captured even if an agent omits data_type.
- Detects missing_data items with reason === "cache_memory_miss" from agent output.
- When cache-memory is available and a cache miss is detected, sets hasCacheMissMisconfiguration = true.
- Adds this as a failure trigger condition (creates/updates issue even when agent succeeded).
- Enhanced buildMissingDataContext() to accept cacheMemoryEnabled and append a specific configuration problem message when a cache-miss misconfiguration is detected.
- Exported buildMissingDataContext for testability.
actions/setup/js/handle_agent_failure.test.cjs: Added focused unit tests for buildMissingDataContext covering: empty output, no cache warning when cacheMemoryEnabled is false, cache warning appended when cacheMemoryEnabled is true and a cache_memory_miss item is present, reason-only item capture, and no false positive for unrelated reasons.
Lock files: All 202 workflow lock files recompiled to pick up the GH_AW_CACHE_MEMORY_ENABLED env var for cache-memory workflows.

…detect misconfiguration in conclusion handler Agent-Logs-Url: https://github.com/github/gh-aw/sessions/506c72c2-0e3f-4503-9915-661948c848f1 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

…ch signals emitted alongside other output Agent-Logs-Url: https://github.com/github/gh-aw/sessions/506c72c2-0e3f-4503-9915-661948c848f1 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

pelikhan · 2026-04-25T23:05:56Z

@copilot use “cache_memory_miss” reason ton be more precise

Agent-Logs-Url: https://github.com/github/gh-aw/sessions/4ddd20f3-5422-4a83-9fda-b21b335627c4 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-04-25T23:10:15Z

@copilot use “cache_memory_miss” reason ton be more precise

Done — renamed to "cache_memory_miss" in all prompt templates and detection logic. (32eca81)

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Pull request overview

Updates cache-memory prompts and failure handling so an agent can explicitly signal a cache miss (missing_data with reason: "cache_memory_miss"), and the conclusion handler can detect this (when cache-memory is configured) and open/update a failure issue/comment indicating a likely configuration problem.

Changes:

Added cache-miss guidance to the built-in cache-memory prompt templates (single + multi-cache variants).
Passed a new GH_AW_CACHE_MEMORY_ENABLED flag into the agent-failure handler environment when cache-memory is configured.
Enhanced handle_agent_failure.cjs to detect cache_memory_miss signals and trigger failure handling (even on agent success), plus append targeted context messaging.
Recompiled workflow .lock.yml files to propagate the new env var into generated workflows.

Show a summary per file

File	Description
pkg/workflow/prompts/cache_memory_prompt.md	Adds cache-miss guidance to the runtime cache-memory prompt (single cache).
pkg/workflow/prompts/cache_memory_prompt_multi.md	Adds cache-miss guidance to the runtime cache-memory prompt (multi cache).
actions/setup/md/cache_memory_prompt.md	Adds `<cache-miss-guidance>` to the setup-time cache-memory prompt template (single cache).
actions/setup/md/cache_memory_prompt_multi.md	Adds `<cache-miss-guidance>` to the setup-time cache-memory prompt template (multi cache).
pkg/workflow/notify_comment.go	Emits `GH_AW_CACHE_MEMORY_ENABLED=true` for the agent-failure handler when cache-memory is configured.
actions/setup/js/handle_agent_failure.cjs	Detects `missing_data.reason === "cache_memory_miss"` + cache-memory availability; triggers failure handling and adds contextual messaging.
.github/workflows/weekly-issue-summary.lock.yml	Propagates `GH_AW_CACHE_MEMORY_ENABLED` into compiled workflow env.
.github/workflows/unbloat-docs.lock.yml	Propagates `GH_AW_CACHE_MEMORY_ENABLED` into compiled workflow env.
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Copilot's findings

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Files reviewed: 93/93 changed files
Comments generated: 7

Copilot · 2026-04-25T23:38:41Z

 <examples>
 __GH_AW_CACHE_EXAMPLES__
 </examples>
+<cache-miss-guidance>If you look for data in the cache and do not find any, call the `missing_data` tool with `reason: "cache_memory_miss"` to signal that the cache does not contain the expected information.</cache-miss-guidance>


This instruction suggests a reason-only missing_data call for cache misses, but the current missing_data context builder only includes items that have both data_type and reason. Consider adjusting the instruction to include a data_type or updating the handler so reason-only items are still captured and displayed.

Copilot · 2026-04-25T23:38:42Z

+  // Detect cache_miss: if cache-memory is available and the agent reported a cache miss,
+  // this indicates the prompt is referencing an incorrect file path within the cache directory.
+  const hasCacheMiss = missingDataMessages.some(m => m.reason === "cache_memory_miss");
+  if (cacheMemoryEnabled && hasCacheMiss) {


buildMissingDataContext() relies on loadMissingDataMessages(), which currently only returns entries when both item.data_type and item.reason are present. With the new cache-miss guidance encouraging a reason-only missing_data call, hasCacheMiss may never become true and the cache-misconfiguration warning may never be appended (and the missing_data section may be empty). Consider treating missing_data items with a reason but no data_type as valid (e.g., use a placeholder data_type) or detect cache-miss directly from raw agentOutputResult.items.

Copilot · 2026-04-25T23:38:42Z

+    // Detect cache-miss misconfiguration: the agent reported a missing_data with reason
+    // "cache_memory_miss" while cache-memory was configured and available.  This indicates the
+    // prompt is referencing an incorrect path inside the cache directory.
+    // Check for items regardless of agentOutputResult.success so that cache-miss signals
+    // emitted alongside other output are not missed when the agent job also fails.
+    let hasCacheMissMisconfiguration = false;
+    if (cacheMemoryEnabled && agentOutputResult.items) {
+      const cacheMissItems = agentOutputResult.items.filter(item => item.type === "missing_data" && item.reason === "cache_memory_miss");
+      if (cacheMissItems.length > 0) {
+        hasCacheMissMisconfiguration = true;
+        core.info(`Cache-miss misconfiguration detected: ${cacheMissItems.length} missing_data item(s) with reason "cache_memory_miss" despite cache-memory being available`);
+      }
+    }


hasCacheMissMisconfiguration is triggered solely by cacheMemoryEnabled + a missing_data item with reason: "cache_memory_miss". cacheMemoryEnabled only indicates that cache-memory is configured, not that the cache was restored/populated, so this may produce false-positive failure issues on first runs or legitimate empty caches. Consider additionally gating this on a cache restore hit / a “cache has content” signal from the workflow, or clarifying the missing_data semantics so cache_memory_miss is only used when data is expected to exist.

Copilot · 2026-04-25T23:38:42Z

+    let hasCacheMissMisconfiguration = false;
+    if (cacheMemoryEnabled && agentOutputResult.items) {
+      const cacheMissItems = agentOutputResult.items.filter(item => item.type === "missing_data" && item.reason === "cache_memory_miss");
+      if (cacheMissItems.length > 0) {
+        hasCacheMissMisconfiguration = true;
+        core.info(`Cache-miss misconfiguration detected: ${cacheMissItems.length} missing_data item(s) with reason "cache_memory_miss" despite cache-memory being available`);
+      }
+    }


New behavior (cache-miss detection driving failure handling even when GH_AW_AGENT_CONCLUSION is success, plus the additional context appended in buildMissingDataContext) isn’t covered by tests. Since this file already has vitest coverage, add a focused test that stubs load_agent_output.cjs to return a missing_data item with reason: "cache_memory_miss" and asserts that failure handling proceeds / expected context is included when GH_AW_CACHE_MEMORY_ENABLED is true.

Copilot · 2026-04-25T23:38:42Z

 - **Last Write Wins**: If multiple processes write to the same file, the last write will be preserved
 - **File Share**: Use this as a simple file share - organize files as you see fit
 - **Allowed File Types**: Only the following file extensions are allowed: `__ALLOWED_EXTENSIONS__`. Files with other extensions will be rejected during validation.
+- **Cache Miss**: If you look for data in the cache and do not find any, call the `missing_data` tool with `reason: "cache_memory_miss"` to signal that the cache does not contain the expected information.


The new guidance tells the agent to call missing_data with only reason: "cache_memory_miss", but the failure handler’s missing_data formatter currently drops missing_data entries unless both data_type and reason are present. This means cache-miss signals may not show up in the missing_data context (and downstream cache-miss messaging may be skipped). Either update this guidance to include a data_type value (e.g. something cache-memory specific) or relax the handler’s missing_data extraction/formatting to handle reason-only items.

Copilot · 2026-04-25T23:38:43Z

 - **Last Write Wins**: If multiple processes write to the same file, the last write will be preserved
 - **File Share**: Use these as simple file shares - organize files as you see fit
 - **Allowed File Types**: Only the following file extensions are allowed: `__ALLOWED_EXTENSIONS__`. Files with other extensions will be rejected during validation.
+- **Cache Miss**: If you look for data in the cache and do not find any, call the `missing_data` tool with `reason: "cache_memory_miss"` to signal that the cache does not contain the expected information.


Same as the single-cache prompt: this guidance suggests calling missing_data with only a reason, but the failure handler’s missing_data extraction currently requires both data_type and reason to include the item in the rendered context. Consider including a data_type here or updating the handler to support reason-only missing_data items so cache misses surface correctly.

Copilot · 2026-04-25T23:38:43Z

 <cache-memory>
 <path>__GH_AW_CACHE_DIR__</path>__GH_AW_CACHE_DESCRIPTION__
 <properties>Persistent read/write storage across workflow runs via Actions cache. Last write wins.</properties>__GH_AW_ALLOWED_EXTENSIONS__
+<cache-miss-guidance>If you look for data in the cache and do not find any, call the `missing_data` tool with `reason: "cache_memory_miss"` to signal that the cache does not contain the expected information.</cache-miss-guidance>


This guidance instructs emitting missing_data with only reason: "cache_memory_miss", but the conclusion handler currently ignores missing_data items that don’t also include data_type, so the signal may not be visible in failure issues/comments. Either include a data_type in the instruction or update the handler to accept reason-only missing_data items.

pelikhan · 2026-04-26T00:01:33Z

@copilot review all comments

…taMessages filter, add tests Agent-Logs-Url: https://github.com/github/gh-aw/sessions/cf6a466e-9e09-4ed9-96b0-1cd485d28637 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-04-26T00:09:30Z

@copilot review all comments

Addressed all review comments in a7c2535:

data_type missing from cache-miss guidance — Updated all prompt templates to instruct agents to call missing_data with both data_type: "cache_memory" and reason: "cache_memory_miss", so items are properly captured and displayed.
loadMissingDataMessages() filtering out reason-only items — Relaxed the filter from requiring both data_type && reason to just reason, using empty string as a fallback for data_type. This ensures cache-miss signals are captured even if an agent omits data_type.
hasCacheMiss detection in buildMissingDataContext() was broken — Fixed by the two items above: items with reason: "cache_memory_miss" now make it into the loaded list.
No tests for cache-miss detection — Exported buildMissingDataContext and added 5 focused unit tests covering: empty output, no cache warning when disabled, cache warning when enabled + cache miss present, reason-only item detection, and no false positive for other reasons.

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https://api.github.com/graphql
- Triggering command: /usr/bin/gh /usr/bin/gh api graphql -f query=query($owner: String!, $name: String!) { repository(owner: $owner, name: $name) { hasDiscussionsEnabled } } -f owner=github -f name=gh-aw (http block)
- Triggering command: /usr/bin/gh /usr/bin/gh api graphql -f query=query($owner: String!, $name: String!) { repository(owner: $owner, name: $name) { hasDiscussionsEnabled } } -f owner=github -f name=gh-aw .go test.go esteps_test.go 1/x6�� n_test.go validation_test.go ions_test.go s_test.go .go _test.go .go (http block)
https://api.github.com/repos/astral-sh/setup-uv/git/ref/tags/eac588ad8def6316056a12d4907a9d4d84ff7a3b
- Triggering command: /usr/bin/gh gh api /repos/astral-sh/setup-uv/git/ref/tags/eac588ad8def6316056a12d4907a9d4d84ff7a3b --jq [.object.sha, .object.type] | @tsv (http block)
- Triggering command: /usr/bin/gh gh api /repos/astral-sh/setup-uv/git/ref/tags/eac588ad8def6316056a12d4907a9d4d84ff7a3b --jq [.object.sha, .object.type] | @tsv h ../../../.prettierignore (http block)
https://api.github.com/repos/github/gh-aw
- Triggering command: /usr/bin/gh gh api /repos/github/gh-aw --jq .default_branch --abbrev-ref HEAD tions/node_modules/.bin/sh (http block)

If you need me to access, download, or install something from one of these locations, you can either:

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Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

- audit.md: document tokens-per-turn and tool calls/bash command breakdown in diff output (PR #28494) - frontmatter.md: add Observability section documenting observability.otlp configuration, object-form OTLP headers (PR #28524), and gen_ai.* span attribute conventions replacing gh-aw.* (PR #28511) - cli.md: update audit diff description to include new output fields (PR #28494) - cache-memory.md: document cache path misconfiguration detection via missing_data signal (PR #28516) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Copilot AI and others added 2 commits April 25, 2026 22:25

feat: instruct agent to call missing_data with cache_miss reason and …

2d967f9

…detect misconfiguration in conclusion handler Agent-Logs-Url: https://github.com/github/gh-aw/sessions/506c72c2-0e3f-4503-9915-661948c848f1 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

fix: detect cache_miss regardless of agentOutputResult.success to cat…

498ed48

…ch signals emitted alongside other output Agent-Logs-Url: https://github.com/github/gh-aw/sessions/506c72c2-0e3f-4503-9915-661948c848f1 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot AI assigned Copilot and pelikhan Apr 25, 2026

Copilot created this pull request from a session on behalf of pelikhan April 25, 2026 22:32 View session

Copilot AI requested a review from pelikhan April 25, 2026 22:32

Copilot finished work on behalf of pelikhan April 25, 2026 22:32

Copilot started work on behalf of pelikhan April 25, 2026 23:06 View session

fix: rename cache_miss reason to cache_memory_miss for precision

32eca81

Agent-Logs-Url: https://github.com/github/gh-aw/sessions/4ddd20f3-5422-4a83-9fda-b21b335627c4 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot AI changed the title ~~feat: cache-memory cache_miss detection and conclusion handler (#XXX)~~ feat: cache-memory cache_memory_miss detection and conclusion handler Apr 25, 2026

Copilot finished work on behalf of pelikhan April 25, 2026 23:11

pelikhan marked this pull request as ready for review April 25, 2026 23:31

Copilot AI review requested due to automatic review settings April 25, 2026 23:31

Copilot started reviewing on behalf of pelikhan April 25, 2026 23:32 View session

github-actions Bot mentioned this pull request Apr 25, 2026

[aw] No-Op Runs #28177

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Copilot AI reviewed Apr 25, 2026

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Copilot started work on behalf of pelikhan April 26, 2026 00:01 View session

fix: add data_type to cache_memory_miss guidance, relax loadMissingDa…

a7c2535

…taMessages filter, add tests Agent-Logs-Url: https://github.com/github/gh-aw/sessions/cf6a466e-9e09-4ed9-96b0-1cd485d28637 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot finished work on behalf of pelikhan April 26, 2026 00:10

pelikhan merged commit 7041238 into main Apr 26, 2026

pelikhan deleted the copilot/update-cache-memory-prompt branch April 26, 2026 00:14

This was referenced Apr 26, 2026

Smoke Test: Codex - 24945190968 #28534

Closed

feat: add object form support for observability.otlp.headers #28524

Merged

Smoke Test: Claude - 24945190957 #28537

Closed

github-actions Bot mentioned this pull request Apr 26, 2026

[docs] Update documentation for features from 2026-04-26 #28577

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