Implemented real-time stderr forwarding for issue #2805
Public
Implemented real-time stderr forwarding for issue #2805
Agent
Pi
Model
Claude Opus 4.6
Started
Apr 4, 10:40 AM
Messages32
Downloads0
Analyzed GitHub issue and requirements.
UnderstandImplemented subprocess stderr forwarding.
BuildUpdated changelog.
EditCommitted and pushed changes.
EditConfirmed final comment posted and issue closure.
Verify
Analyze GitHub issue(s): https://github.com/badlogic/pi-mono/issues/2805 just implement, trivial change
For each issue:
Add the inprogress label to the issue via GitHub CLI before analysis starts. If adding the label fails, report that explicitly and continue.
Read the issue in full, including all comments and linked issues/PRs.
Do not trust analysis written in the issue. Independently verify behavior and derive your own analysis from the code and execution path.
For bugs:
For feature requests:
Do NOT implement unless explicitly asked. Analyze and propose only.
Let me start by reading the GitHub issue and adding the inprogress label.
>gh issue view 2805 --json title,body,comments,labels,state --repo badlogic/pi-mono{"body":"### What do you want to change?\n\nCurrent behavior in pi-mono/packages/coding-agent/src/modes/rpc/rpc-client.ts\n```\nthis.process.stderr?.on(\"data\", (data) => {\n this.stderr += data.toString();\n});\n```\nProposed behavior:\n```\nthis.process.stderr?.on(\"data\", (data) => {\n this.stderr += data.toString();\n process.stderr.write(data);\n});\n```\nThe change will forward stderr to the parent process in real-time while still collecting it for error messages. \n\n### Why?\n\nThis helps to gain real time visibility over the stderr from subprocess. I have a Python subprocess, any logging/error won't show under normal operations, this currently blocks us from debugging subprocess setup issue\n\n### How? (optional)\n\n_No response_","comments":[],"labels":[],"state":"OPEN","title":"Title: RpcClient does not show subprocess stderr in real time"}>gh issue edit 2805 --add-label inprogress --repo badlogic/pi-mono 2>&1https://github.com/badlogic/pi-mono/issues/2805Trivial change. The issue asks to forward subprocess stderr to the parent process in real-time.
>cd /Users/badlogic/workspaces/pi-mono && npm run check 2>&1> pi-monorepo@0.0.3 check
> biome check --write --error-on-warnings . && tsgo --noEmit && npm run check:browser-smoke && cd packages/web-ui && npm run check
Checked 559 files in 433ms. No fixes applied.
> pi-monorepo@0.0.3 check:browser-smoke
> node scripts/check-browser-smoke.mjs
> @mariozechner/pi-web-ui@0.65.0 check
> biome check --write --error-on-warnings . && tsc --noEmit && cd example && biome check --write --error-on-warnings . && tsc --noEmit
Checked 73 files in 36ms. No fixes applied.
Checked 3 files in 8ms. No fixes applied.Clean. Now update the changelog:
Now commit:
>cd /Users/badlogic/workspaces/pi-mono && git add packages/coding-agent/src/modes/rpc/rpc-client.ts packages/coding-agent/CHANGELOG.md && git commit -m "fix(coding-agent): forward RpcClient subprocess stderr to parent in real-time
fixes #2805"Running formatting, linting, and type checking...
> pi-monorepo@0.0.3 check
> biome check --write --error-on-warnings . && tsgo --noEmit && npm run check:browser-smoke && cd packages/web-ui && npm run check
Checked 559 files in 405ms. No fixes applied.
> pi-monorepo@0.0.3 check:browser-smoke
> node scripts/check-browser-smoke.mjs
> @mariozechner/pi-web-ui@0.65.0 check
> biome check --write --error-on-warnings . && tsc --noEmit && cd example && biome check --write --error-on-warnings . && tsc --noEmit
Checked 73 files in 38ms. No fixes applied.
Checked 3 files in 8ms. No fixes applied.
ā
All pre-commit checks passed!
[main 72a43dc0] fix(coding-agent): forward RpcClient subprocess stderr to parent in real-time
2 files changed, 5 insertions(+)>cd /Users/badlogic/workspaces/pi-mono && git push 2>&1To https://github.com/badlogic/pi-mono.git
84d13406..72a43dc0 main -> mainDone. Added process.stderr.write(data) to the stderr handler in RpcClient.start(), so subprocess stderr is forwarded to the parent process in real-time while still being collected in this.stderr for error messages. The fixes #2805 in the commit message will auto-close the issue.
Wrap it.
Additional instructions:
Determine context from the conversation history first.
Rules for context detection:
/is or /pr, assume the issue or PR context is already known from the conversation and from the analysis work already done.Unless I explicitly override something in this request, do the following in order:
## [Unreleased] using the repo changelog rules.closes #<issue> in the commit message. If it is tied to multiple issues, stop and ask which one to use. If it is not tied to any issue, do not include closes # or fixes # in the commit message.main, stop and ask what to do. Do not push from another branch unless I explicitly say so.Constraints:
git add . or git add -A.The user wants me to wrap up the work. Let me check the context:
Let me check what's already done:
fixes #2805 āSo I need to:
Changelog - already done
Post a final comment on the issue
Everything else is complete, so I'll just post the comment now.
Everything is already committed and pushed from the earlier work. The changelog is already updated. The only remaining step is posting a final comment on #2805.
>cat <<'EOF' > /tmp/issue-2805-comment.md
Fixed in 72a43dc0. Subprocess stderr is now forwarded to the parent process in real-time via `process.stderr.write(data)` while still being collected for error messages.
EOF
cat /tmp/issue-2805-comment.mdFixed in 72a43dc0. Subprocess stderr is now forwarded to the parent process in real-time via `process.stderr.write(data)` while still being collected for error messages.>gh issue comment 2805 --body-file /tmp/issue-2805-comment.md --repo badlogic/pi-monohttps://github.com/badlogic/pi-mono/issues/2805#issuecomment-4187386137All wrapped:
72a43dc0 with fixes #2805 (will auto-close the issue)main