From 90928bd000c8af8645638b5b8f9aede75e96b296 Mon Sep 17 00:00:00 2001
From: WEN Hao <wenh06@gmail.com>
Date: Tue, 3 Nov 2026 11:01:27 +0800
Subject: [PATCH] ci(codecov): make the full-flag project status informational

Per-flag project statuses came from the flag_management default rules
(#84). On a PR, the full flag is carried forward from the nightly base
and projected onto the PR head, so the first PR that adds coverable
lines (#93, +60) degraded the projected full coverage past the 0.5%
threshold and failed codecov/project/projectfull -- a structural false
positive: db-marked coverage only refreshes in the nightly run, so no
PR can ever defend it.  #90-#92 passed only because they were
docs-only.

Split the default rules into explicit per-flag rules: core keeps the
enforcing project status (PRs upload it), full goes informational
(nightly monitoring signal, visible on codecov.io and in the nightly
report, but never gates a PR).
---
 codecov.yml | 34 +++++++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 7 deletions(-)

diff --git a/codecov.yml b/codecov.yml
index af8b9c1a..5eb2034f 100644
--- a/codecov.yml
+++ b/codecov.yml
@@ -13,15 +13,35 @@
 # combined default project status disabled.  Patch status stays
 # informational because coverage of `db`-marked tests only refreshes
 # nightly.
+#
+# The `full` project status is informational for the same reason: on a PR,
+# the full flag is carried forward from the nightly base and projected
+# onto the PR head, so any PR that adds coverable lines (the first was
+# #93: +60 lines) degrades the projected full coverage beyond the
+# threshold -- a structural false positive, since db-marked coverage
+# cannot refresh outside the nightly run.  The full flag remains an
+# enforceable signal on the nightly upload itself (visible on codecov.io
+# and in the nightly report); PRs are gated on `core`, which they upload.
 
 flag_management:
-  default_rules:
-    carryforward: true
-    statuses:
-      - name_prefix: project
-        type: project
-        target: auto
-        threshold: 0.5%
+  flag_rules:
+    - name: core
+      carryforward: true
+      statuses:
+        - name_prefix: project
+          type: project
+          target: auto
+          threshold: 0.5%
+    - name: full
+      carryforward: true
+      statuses:
+        - name_prefix: project
+          type: project
+          target: auto
+          threshold: 0.5%
+          # informational: PRs cannot refresh db-marked coverage (nightly
+          # only), so the carried-forward projection must not gate them
+          informational: true
 
 coverage:
   status: