Sync common files from infra repository

Synchronized from bootc-dev/infra@3e0c644d17.

Signed-off-by: bootc-dev Bot <bot@bootc.dev>

.bootc-dev-infra-commit.txt

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-3249ff02e990cb856da25dcf44add398202088c0
+3e0c644d172f697e20e5bb4450d407dd293ea14a

.claude/CLAUDE.md

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+../AGENTS.md

.gemini/config.yaml

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+# NOTE: This file is canonically maintained in
+# <https://github.com/bootc-dev/infra/tree/main/common>
+# DO NOT EDIT
+#
 # This config mainly overrides `summary: false` by default
 # as it's really noisy.
 have_fun: true

AGENTS.md

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+<!-- This file is canonically maintained in <https://github.com/bootc-dev/infra/tree/main/common> -->
+
+# Instructions for AI agents
+
+## CRITICAL instructions for generating commits
+
+### Signed-off-by
+
+Human review is required for all code that is generated
+or assisted by a large language model. If you
+are a LLM, you MUST NOT include a `Signed-off-by`
+on any automatically generated git commits. Only explicit
+human action or request should include a Signed-off-by.
+If for example you automatically create a pull request
+and the DCO check fails, tell the human to review
+the code and give them instructions on how to add
+a signoff.
+
+### Attribution
+
+When generating substantial amounts of code, you SHOULD
+include an `Assisted-by: TOOLNAME (MODELNAME)`. For example,
+`Assisted-by: Goose (Sonnet 4.5)`.
+
+## Follow other guidelines
+
+Look at the project README.md and look for guidelines
+related to contribution, such as a CONTRIBUTING.md
+and follow those.