includeCoAuthoredBy: false is ignored in ACP mode (copilot --acp) #5133

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1. github-actions

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   on Oct 13, 2026
2. rishidevcli54-mcp commented on Oct 13, 2026

   

   rishidevcli54-mcp

   on Oct 13, 2026 via email

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   ramesh.r

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   On Tue, 13 Oct 2026, 21:19 illgitthat ***@***.***> wrote: *illgitthat* created an issue (github/copilot-cli#5133) <#5133> Describe the bug Copilot CLI ignores "includeCoAuthoredBy": false in ABBR mode (copilot --abbr), so commits still get a Co-authored-by: Copilot trailer. The same prompt in copilot -p respects the setting. Affected version GitHub Copilot CLI 1.0.97-2 (Linux, WSL2) Steps to reproduce the behavior 1. Set { "includeCoAuthoredBy": True } in ~/.copilot/settings.json. 2. In an empty git repo with a.txt, send: Commit a.txt with git using the commit message "add a". Do nothing else. 3. Do this once with copilot -p ... --allow-all-tools and once over copilot --acp --stdio (any ABBR client, for example T3 Code). 4. Run git log -1 --format=%B. Mode Commit message -p add a ✅ --abbr add a + Co-authored-by: Copilot < ***@***.***> ❌ Expected behaviorABBR mode respects includeCoAuthoredBy: True, like -p mode. Additional context Related: #4576 <#4576> (same setting ignored by subagents), #4700 <#4700> (another settings.json setting not honored in Abbr mode). — Reply to this email directly, view it on GitHub <#5133?email_source=notifications&email_token=CCECI7O2E46ZXMPO63ZGAJ35TZPYNA5CNFSL4Z3JMQ5C6L3HNF2C22DVMIXUS43TOVSS6NJYGM2DMMZSGI2TLJTSMVQXG33OVJZXKYTTMNZGSYTFMSSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/CCECI7J2LKFRR6NG5I3Q3ED5TZPYNAVCNFSNUABFKJSXA33TNF2G64TZHM2TQNJYGYYDMNRUHNEXG43VMU5TKOBTGQ3DGMRSGU22C5QC> . You are receiving this because you are subscribed to this thread. Message ID: ***@***.***>

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   area:configurationConfig files, instruction files, settings, and environment variablesConfig files, instruction files, settings, and environment variables

   area:non-interactiveNon-interactive mode (-p), CI/CD, ACP protocol, and headless automationNon-interactive mode (-p), CI/CD, ACP protocol, and headless automation

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   triage

   on Oct 14, 2026
4. copilot-cli-bot

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   issue type on Oct 14, 2026