docs: stop saying CPython refuses AI co-authors (#65)

Author: shenxianpeng

docs/guides/policies.md

@@ -246,12 +246,13 @@ Suggest: Write the Assisted-by value so that it matches ^\S+/\S+$ (set by ai_dis
 That failure carries no correction, because the tool should not guess which
 model or format you meant.
 
-### Disclosure that is appreciated, not required
+### Refusing the tool as a co-author, without asking for disclosure
 
-Some projects — [CPython](https://devguide.python.org/getting-started/generative-ai/)
-among them — welcome disclosure without demanding it, while still refusing the
-tool as a co-author. Put CC014 in the top-level `warn` list and the other two
-keep enforcing:
+[pip](https://github.com/pypa/pip/blob/main/AI_POLICY.md) and
+[attrs](https://github.com/python-attrs/attrs/blob/main/.github/AI_POLICY.md)
+close any pull request that lists an LLM as a co-author, but they don't ask
+contributors to disclose AI use. Put CC014 in the top-level `warn` list and
+the other two keep enforcing:
 
 ```toml title="cchk.toml"
 warn = ["ai_disclosure"]
@@ -268,9 +269,17 @@ Docs: https://commit-check.com/rules/#cc014
 This rule is set to warn in the config; it does not fail the run.
 ```
 
-The run still passes. See
+The run still passes. The warning still suggests a disclosure that pip and
+attrs don't ask for: commit-check has no switch that turns off a single rule,
+so reporting CC014 is as quiet as it gets. See
 [Report a rule without enforcing it](../configuration.md#report-a-rule-without-enforcing-it).
 
+[CPython](https://devguide.python.org/getting-started/ai-tools/) sets no rule
+for commits at all: disclosing AI use is appreciated but not required, and
+triagers judge each contribution by whether its author can explain it in their
+own words. A policy like that leaves nothing for commit-check to enforce, so
+keep `ai_attribution` at its default, `"ignore"`.
+
 ### Exempting automation
 
 Bots that legitimately carry AI trailers can be excluded: