docs(agents): before editing a workflow file, derive its test readers with git grep and run them (objectui#9198)

.changeset/issue-9198-workflow-test-readers-habit.md

@@ -0,0 +1,19 @@
+---
+---
+
+`AGENTS.md` only — no released package source is touched, so this declares **no release** with
+an empty frontmatter rather than a bump. A `patch` here would version-bump the whole 39-package
+fixed group for a change no consumer can observe.
+
+objectui#9198: adds one habit line to the workflows discipline, beside the `git cat-file -e` probes
+that answer "does this repo run this workflow". Before a `.github/workflows` file is edited, the
+tests that read it are DERIVED with a `git grep` over test paths and every hit is run locally,
+instead of being recalled from memory by name similarity to the workflow. The round that motivated
+it listed six pins by name and missed the one that went red, because that pin is not named after
+any workflow.
+
+The line states its own limit rather than leaving it to be assumed: the text search is wrong in
+both directions, and the readers it cannot see — directory enumeration, a shared helper doing the
+read, a gate script walking the tree — are recorded on objectui#9198, not covered by the habit.
+The director seat's ruling on that card declines to build a collector or a gate for them; the one
+incident this habit exists to prevent is inside the search's hits.

AGENTS.md

@@ -394,6 +394,9 @@ git cat-file -e origin/main:.github/workflows/ci.yml    # 阳性对照:必须解
 **阳性对照不是可选项。** 没有它,一个打错的路径和一次真实的缺席给出完全相同的退出码,而你会把前者读成
 后者。
 
+**改 `.github/workflows/X.yml` 之前,先把读它的测试推导出来、别凭名字回忆:** `git grep -l 'X.yml' -- '**/__tests__/**' '**/*.test.*'`,命中逐个本地跑。
+一次 workflow 编辑把一个没列出来的钉子弄红,是对这条习惯的发现,⛔ 不是对那一轮的发现;这条搜索两个方向都会错,它看不见的那半记在 objectui#9198 上,不在本条覆盖内。
+
 #### ⛔ 对照本身还有一个洞:**枚举**和**读取**必须来自不同来源才验得动
 
 `origin/main` 阅读规则覆盖的是文件**内容**,**不覆盖文件枚举**。把工作树 glob 喂给逐文件的 `origin/main`