revert: trunk-only CI gating (repo not in merge-train core set)

.github/workflows/cloud-runtime-artifact.yml

@@ -40,7 +40,6 @@ permissions:
 
 jobs:
   linux-x64-artifact:
-    if: (github.event_name != 'pull_request' && github.event_name != 'pull_request_target') || github.head_ref == 'trunk'
     runs-on: ubuntu-24.04
     timeout-minutes: 30
     steps:

.github/workflows/review-swarm-wrapper-guard.yml

@@ -10,7 +10,6 @@ permissions:
 
 jobs:
   guard:
-    if: (github.event_name != 'pull_request' && github.event_name != 'pull_request_target') || github.head_ref == 'trunk'
     runs-on: ubuntu-latest
     steps:
       # pull_request_target always reads this workflow and script from the PR

.github/workflows/review-swarm.yml

@@ -14,7 +14,6 @@ concurrency:
 
 jobs:
   review:
-    if: (github.event_name != 'pull_request' && github.event_name != 'pull_request_target') || github.head_ref == 'trunk'
     runs-on: ubuntu-latest
     # Ordering invariant: swarm 60m < poll 65m < job 75m.
     timeout-minutes: 75

.github/workflows/schema-publish.yml

@@ -27,7 +27,6 @@ concurrency:
 
 jobs:
   validate:
-    if: (github.event_name != 'pull_request' && github.event_name != 'pull_request_target') || github.head_ref == 'trunk'
     runs-on: ubuntu-24.04
     timeout-minutes: 10
     outputs:
@@ -82,9 +81,7 @@ jobs:
           if-no-files-found: error
 
   npm:
-    if: >-
-      ((github.event_name != 'pull_request' && github.event_name != 'pull_request_target') || github.head_ref == 'trunk') &&
-      (github.event_name != 'pull_request')
+    if: github.event_name != 'pull_request'
     needs: validate
     runs-on: ubuntu-24.04
     timeout-minutes: 5
@@ -104,9 +101,7 @@ jobs:
         run: npm publish "release/relayflows-schema-${RELEASE_VERSION}.tgz" --access public --ignore-scripts
 
   pages:
-    if: >-
-      ((github.event_name != 'pull_request' && github.event_name != 'pull_request_target') || github.head_ref == 'trunk') &&
-      (github.event_name != 'pull_request')
+    if: github.event_name != 'pull_request'
     needs: [validate, npm]
     runs-on: ubuntu-24.04
     timeout-minutes: 10

.github/workflows/surface-package.yml

@@ -24,7 +24,6 @@ permissions:
 
 jobs:
   packed-consumer:
-    if: (github.event_name != 'pull_request' && github.event_name != 'pull_request_target') || github.head_ref == 'trunk'
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:

AGENTS.md

@@ -109,43 +109,3 @@ Therefore:
 
 The code being right does not rescue a report that is wrong. A reviewer can
 only judge what it can check.
-
-<!-- prpm:snippet:start @agent-relay/merge-train-snippet@1.0.0 -->
-## Merging: `trunk` + the `mergeable` label
-
-CI does **not** run on feature branches. It runs only on the `trunk` → `main`
-pull request and on pushes to `main`. (Repos whose default branch is not
-`main`, e.g. `master`, use that branch wherever this says `main`.) A merge
-agent batches ready PRs into `trunk`, gets that one PR green, and merges it.
-
-**When you open a PR**
-1. Branch from `trunk` and open the PR with **base `trunk`**, not `main`.
-   A PR into `main` from any other branch fails the `Trunk guard` check.
-2. No CI runs on your PR, so verify locally before calling it ready: run the
-   typecheck, tests and lint this repo uses, and list the exact commands and
-   results in the PR body.
-
-**When the PR is ready**
-3. Add the label **`mergeable`** once all of these are true:
-   - The change is complete and the local checks above pass.
-   - Review feedback (human and bot) is addressed or answered.
-   - It is not a draft and does not depend on an unmerged PR.
-4. Remove `mergeable` if the PR stops being ready (new work, a failing check, a
-   blocking question). The label is read live from GitHub on every sweep.
-
-**What you must not do**
-- Do not merge your own PR, and never merge into or push to `trunk` or `main`
-  directly.
-- Do not re-enable CI for feature branches or edit the `trunk` gates in
-  `.github/workflows/`.
-
-**The merge agent** sweeps open `mergeable` PRs with base `trunk` about every
-10 minutes. It reads each PR's linked sessions (the `Agent Relay sessions`
-block in the PR body, then the session summary) for context, merges them into
-`trunk`, opens or updates the `trunk` → `main` PR, fixes CI there, merges when
-green, and posts a summary. If your PR conflicts with `trunk`, it may ask you
-to rebase on `trunk`; do so and keep the label.
-
-> Interim: the sweep worker is not deployed yet. Until it is, a human or a
-> designated agent performs the merge-agent steps manually. Labelling is unchanged.
-<!-- prpm:snippet:end @agent-relay/merge-train-snippet@1.0.0 -->