Close issue #140: sub-agent redundant file reads resolved by PR #172

[fullsend-ai-retro]

What happened

Issue #140 was filed on 2026-07-13, describing how review sub-agents re-read files already loaded by the parent orchestrator — 8 of 25 file reads (32%) were redundant duplicates on a 3-file PR. The issue proposed passing source file contents directly in sub-agent prompts.

PR #172 (merged 2026-07-17) implements exactly this fix: the orchestrator now fetches source file contents at PR head SHA and passes them inline to sub-agents via a source_files field in the context package. The meta-prompt constraint was updated to say "Do not re-read files already in the source files section."

However, PR #172 does not reference issue #140 — it references fullsend-ai/fullsend#1924 (the upstream issue) and fullsend-ai/fullsend#1926 (the upstream PR). Issue #140 remains open with no cross-link to the fix.

What could go better

The code agent that authored PR #172 was working from upstream issue fullsend-ai/fullsend#1924 and did not discover the local duplicate issue #140 in this repo. This is a common pattern when the same problem is tracked in multiple repos — the upstream issue gets closed but the downstream tracking issue is forgotten.

Confidence: high — issue #140's description ("pass relevant file content snippets to sub-agents rather than requiring them to independently read the same files") is precisely what PR #172 implements.

Proposed change

Close issue #140 with a comment linking to PR #172 as the resolution. The comment should note that PR #172's source file passthrough directly addresses issue #140's requirements: source file contents are now passed inline to sub-agents, and the meta-prompt constraint prohibits re-reading files already in the source files section.

Also verify whether issue #140's validation criterion ("each changed file read at most twice across the entire review") is satisfied by the new implementation. Note that for large PRs (>20 files), some files may still not be included in the source_files section, and sub-agents may still attempt disk reads for those (see the separate sub-agent tool gap proposal).

Validation criteria

1. Issue Review agent sub-agents re-read files already loaded by parent orchestrator #140 is closed with a cross-reference to PR perf(#1924): pass source file contents to review sub-agents #172.
2. No other open issues in fullsend-ai/agents track the same redundant-file-read problem.

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Generated by retro agent from #172

[fullsend-ai-triage]

🤖 Finished Triage · ✅ Success · Started 11:19 AM UTC · Completed 11:22 AM UTC
Commit: b7d92a0 · View workflow run →

[fullsend-ai-triage]

Triage Summary

Severity: Low | Category: Housekeeping

Assessment

This is a well-defined housekeeping task. The analysis is confirmed:

• Issue Review agent sub-agents re-read files already loaded by parent orchestrator #140 is still open, describing how review sub-agents re-read files already loaded by the parent orchestrator (32% redundant reads on a 3-file PR).
• PR perf(#1924): pass source file contents to review sub-agents #172 (merged 2026-07-17) implements the exact fix: source file contents are fetched at PR head SHA and passed inline to sub-agents via a source_files field, with a meta-prompt constraint prohibiting re-reads.
• PR perf(#1924): pass source file contents to review sub-agents #172 did not cross-reference Review agent sub-agents re-read files already loaded by parent orchestrator #140 because the authoring agent worked from upstream issues (fullsend-ai/fullsend#1924 and #1926).

Duplicate scan

No other open issues track the same redundant-file-read problem. Issue #204 (sub-agent over-dispatch on version bumps) is related but distinct.

Recommended action

Close issue #140 with a comment noting:

1. PR perf(#1924): pass source file contents to review sub-agents #172 passes source file contents inline to sub-agents, eliminating redundant disk reads
2. The meta-prompt constraint prohibits re-reading files already provided in the source files section
3. For large PRs (>20 files or >5000 lines), a size guard defers file selection and sub-agents fall back to GitHub contents API reads

Then close this issue (#252) as complete.

Proposed verification

# Confirm #140 is closed with cross-reference to PR #172
gh issue view 140 --repo fullsend-ai/agents --json state,comments
# Confirm no other open issues track redundant file reads
gh issue list --repo fullsend-ai/agents --state open --search "redundant file read" --json number,title

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Labels: This is a housekeeping issue filed by the retro agent. Adding 'triaged' and 'retro-agent' labels to reflect its source and triage status.

[fullsend-ai-prioritize]

RICE Priority Score: 0.25

Score breakdown

Dimension	Score	Reasoning
Reach	0.25	This is purely an internal housekeeping task — closing a stale issue and adding a cross-reference. It affects no end users or customers; it only improves issue tracker hygiene for the maintainers of this repo.
Impact	0.25	Minimal impact. The underlying problem (redundant file reads) was already fixed by PR #172. This issue only asks to close #140 with a linking comment, which is a cosmetic/organizational improvement to the project board.
Confidence	1.0	Very high confidence. The issue is precisely defined with clear validation criteria (close #140 with a cross-reference to PR #172). The triage agent confirmed the analysis, and there is no ambiguity in scope or requirements.
Effort	0.25	Trivial. The entire task is to post a comment on issue #140 linking to PR #172 and close it. No code changes, no testing, no design work — just a GitHub issue management action.

Formula: (0.25 x 0.25 x 1.0) / 0.25 = 0.25