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Protect JSON CLI stdout from PHP diagnostics - #1309

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chubes4 merged 1 commit into

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fix/1279-json-output-purity

Aug 30, 2026

chubes4 commented Aug 30, 2026

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Summary

detect DMC JSON requests before Composer/runtime bootstrap
route PHP diagnostics to stderr while leaving human formats unchanged
prove stdout remains strict-parseable in a subprocess contract

Fixes #1279.

Verification

php tests/cli-json-stdout-guard.php
php tests/workspace-show-cli-format-contract.php
git diff --check

AI assistance

Model: openai/gpt-5.6-sol
Tool: OpenCode
Used for: Investigated the corrupted stream, implemented the early CLI guard and subprocess regression coverage, and ran focused verification.


          Protect JSON CLI stdout from diagnostics

7b5b890

chubes4 merged commit 7cbc1f4 into main

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