fix(ci): harden PR-Agent /improve for large diffs - #436
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Cap max_model_tokens so /improve splits big PRs into chunks instead of one call that finishes with empty content (finish_reason=length), and lower reasoning_effort / suggestions-per-chunk to leave room for YAML output.
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Reviewer's guide (collapsed on small PRs)Reviewer's GuideHardened PR-Agent /improve for large diffs by lowering model token budgets to force chunking, reducing reasoning and suggestion output to avoid empty length-truncated completions, and adding an explicit AI timeout. Sequence diagram for chunked PR-Agent improve processingsequenceDiagram
actor User
participant Workflow as PR-Agent workflow
participant Improve as PR-Agent /improve
participant Model as Gemini or DeepSeek
User->>Workflow: /improve comment
Workflow->>Improve: Load workflow and .pr_agent.toml configuration
Improve->>Improve: max_model_tokens = 100000
Improve->>Improve: Split large PR into chunks
loop Each PR chunk
Improve->>Model: Generate suggestions with reasoning_effort = low
Model-->>Improve: Suggestions
end
Improve->>Improve: num_code_suggestions_per_chunk = 4
Improve-->>User: Post improvement suggestions
File-Level Changes
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Essentials Run ID: 📒 Files selected for processing (2)
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Included review availability: This review used your included allowance. 0 included reviews remain after this review. Your included PR review attempts over the past 7 days set your current allowance at 2 reviews per hour. 📝 WalkthroughWalkthroughThe PR-Agent workflow lowers both model token limits, sets the AI timeout to 180 seconds, and removes the reasoning effort setting. The project configuration reduces code suggestions per chunk from 8 to 4 and adds comments about chunking. ChangesPR-Agent settings
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Merge Risk: ⚪ Minimal · up to The PR updates the model limits, timeout, and suggestions-per-chunk settings, and removes the ineffective reasoning override. No current-head issue requiring changes before merge was established. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description includes relevant summary, test plan, change type, and file walkthrough sections. However, it repeatedly states that reasoning_effort is set to low, while the changes remove that setting. Resolution Update the Summary, Description, and File Walkthrough to state that reasoning_effort was removed because PR-Agent v0.45.0 does not forward it for the configured models. Add the CLA text if the repository requires it in the pull request description.
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Inline comments:
In @.github/workflows/pr-agent.yml:
- Line 40: Update the PR-Agent configuration so `reasoning_effort` is effective
for both configured models: either add provider-correct support for
`gemini/gemini-3.8-flash` and `deepseek/deepseek-v4-flash` in the pinned
implementation or switch to models supported by v0.45.0. At
`.github/workflows/pr-agent.yml` line 40, make the corresponding model or
support change; at `.pr_agent.toml` line 8, retain the setting only if those
models can receive it, otherwise remove it and the `/improve` rationale that
depends on it.
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Configuration used: defaults
Review profile: CHILL
Plan: Essentials
Run ID: 702edb1e-90ce-4997-a88f-c917b56ae391
📒 Files selected for processing (2)
.github/workflows/pr-agent.yml.pr_agent.toml
Included review availability: This review used your included allowance. 1 included review remains after this review. Your included PR review attempts over the past 7 days set your current allowance at 2 reviews per hour.
PR-Agent v0.45.0 only forwards reasoning_effort for allowlisted model ids (e.g. gemini-2.5-flash), not gemini-3.8-flash / deepseek-v4-flash. Keep the chunking and suggestions-per-chunk caps that actually fix empty /improve.
buke
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Oct 3, 2026
* chore: bump gorm.io/driver/postgres in the go-minor-patch group (#425) Bumps the go-minor-patch group with 1 update: [gorm.io/driver/postgres](https://github.com/go-gorm/postgres). Updates `gorm.io/driver/postgres` from 1.6.2 to 1.6.3 - [Commits](go-gorm/postgres@v1.6.2...v1.6.3) --- updated-dependencies: - dependency-name: gorm.io/driver/postgres dependency-version: 1.6.3 dependency-type: direct:production update-type: version-update:semver-patch dependency-group: go-minor-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Brian Wang <wangbuke@gmail.com> * ci(pr-gate): run gate on every pull request (#431) * ci(pr-gate): also run on PRs targeting feat/choy-ui-kit Stacked kit PRs merge into the integration branch first; without this base in the pull_request filter, PR Gate never starts (only main matched). * ci(pr-gate): run on every pull request base Drop the pull_request.branches allowlist so stacked PRs into integration branches get the same discover-routed gate as PRs into main. * fix(ci): harden PR-Agent /improve for large diffs (#436) * fix(ci): harden PR-Agent /improve for large diffs Cap max_model_tokens so /improve splits big PRs into chunks instead of one call that finishes with empty content (finish_reason=length), and lower reasoning_effort / suggestions-per-chunk to leave room for YAML output. * fix(ci): drop no-op reasoning_effort for PR-Agent models PR-Agent v0.45.0 only forwards reasoning_effort for allowlisted model ids (e.g. gemini-2.5-flash), not gemini-3.8-flash / deepseek-v4-flash. Keep the chunking and suggestions-per-chunk caps that actually fix empty /improve. * chore: bump the-pr-agent/pr-agent in the github-actions group (#445) Bumps the github-actions group with 1 update: [the-pr-agent/pr-agent](https://github.com/the-pr-agent/pr-agent). Updates `the-pr-agent/pr-agent` from 0.45.0 to 0.46.0 - [Release notes](https://github.com/the-pr-agent/pr-agent/releases) - [Changelog](https://github.com/The-PR-Agent/pr-agent/blob/main/CHANGELOG.md) - [Commits](The-PR-Agent/pr-agent@v0.45.0...v0.46.0) --- updated-dependencies: - dependency-name: the-pr-agent/pr-agent dependency-version: 0.46.0 dependency-type: direct:production update-type: version-update:semver-minor dependency-group: github-actions ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> * chore: bump google.golang.org/grpc in the go-minor-patch group (#446) Bumps the go-minor-patch group with 1 update: [google.golang.org/grpc](https://github.com/grpc/grpc-go). Updates `google.golang.org/grpc` from 1.83.2 to 1.84.0 - [Release notes](https://github.com/grpc/grpc-go/releases) - [Commits](grpc/grpc-go@v1.83.2...v1.84.0) --- updated-dependencies: - dependency-name: google.golang.org/grpc dependency-version: 1.84.0 dependency-type: direct:production update-type: version-update:semver-minor dependency-group: go-minor-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Brian Wang <wangbuke@gmail.com> * feat(web): align auth and shell chrome with shadcn blocks Keep emerald primary for CTAs only: links and Lucide inherit text color, cards use bg-card, search/sidebar drop primary outlines. Login/register compose Field/Input/Checkbox; the product header shows breadcrumbs instead of a second brand. * fix(web): clear UA chrome and show checkbox/close icons - Drop native button/input borders and use ring-3 focus without preflight. - Paint checkbox checked state with utilities the engine actually emits. - Stop table translate-y from applying to every checkbox. - Replace text × closes with Lucide X; show the auth logo without a primary tile. * style(web): use min-h-control and wrap-break-word utilities - Replace min-h-[var(--choy-control-height)] with the height-control token. - Prefer wrap-break-word over the equivalent break-words alias. * fix(auth): stop terms links from toggling the checkbox Links inside the associated label would bubble to the control; stop the click so Terms/Privacy do not flip agreeTerms. * test(auth): cover AuthPanel brand navigation Click the brand lockup with a stub router so onBrandClick is exercised. --------- Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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User description
Summary
/improvefailed with Gemini 503 then DeepSeekfinish_reason=length(empty content) on a ~3.5k-line single-chunk PR.max_model_tokens/custom_model_max_tokensat 100k so large PRs are chunked.reasoning_effort=lowand cutnum_code_suggestions_per_chunk8→4 to reduce truncated empty completions.Test plan
main(issue_comment //improveloads workflow +.pr_agent.tomlfrom default branch)/improveand confirm logs showNumber of PR chunk calls: > 1(or success) instead of emptyfinish_reason=lengthSummary by Sourcery
Harden PR-Agent /improve processing for large pull requests by constraining model budgets and improving response reliability.
Bug Fixes:
Enhancements:
CI:
PR Type
Enhancement
Description
Cap PR-Agent token limits to 100k
Set reasoning effort to low
Reduce suggestions per chunk to four
Increase AI timeout to 180 seconds
File Walkthrough
pr-agent.yml
Tune PR-Agent token caps and timeout settings.github/workflows/pr-agent.yml
custom_model_max_tokensandmax_model_tokensto100000toenforce chunking on large diffs
config.reasoning_efforttolowto reduce output token exhaustionconfig.ai_timeoutset to180.pr_agent.toml
Adjust PR-Agent reasoning effort and suggestions count.pr_agent.toml
[config]section settingreasoning_effort = "low"num_code_suggestions_per_chunkfrom8to4in[pr_code_suggestions]Summary by CodeRabbit