diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2ea989..dfbd707 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@ The project uses a simple pre-release changelog during early development.
 
 ### Changed
 
+- Gate 0 project contract review completed successfully.
 - `ended_at` is optional for active or interrupted sessions.
 - Repetition and timed exercise modes are now mutually exclusive.
 - Exercise display-name anti-duplication semantics are defined.
diff --git a/docs/exchange_format.md b/docs/exchange_format.md
index 028f8e5..ebcfe48 100644
--- a/docs/exchange_format.md
+++ b/docs/exchange_format.md
@@ -8,7 +8,7 @@ Current state:
 
 ```text
 TRAINLOG_FORMAT_V1=DRAFT
-GATE_0=VALIDATION_PENDING
+GATE_0=PASS
 ```
 
 Incompatible changes are allowed until the format is explicitly marked `FROZEN`.
diff --git a/docs/reviews/gate0_review_01.md b/docs/reviews/gate0_review_01.md
index 8c916e4..f91daa8 100644
--- a/docs/reviews/gate0_review_01.md
+++ b/docs/reviews/gate0_review_01.md
@@ -3,8 +3,8 @@
 ## Status
 
 ```text
-GATE_0_REVIEW_01=IMPLEMENTED
-GATE_0=VALIDATION_PENDING
+GATE_0_REVIEW_01=PASS
+GATE_0=PASS
 TRAINLOG_FORMAT_V1=DRAFT
 ```
 
@@ -116,13 +116,44 @@ Expected result:
 - every invalid fixture reports `PASS invalid`;
 - `git diff --check` prints nothing.
 
+## Validation evidence
+
+Canonical local validation reported:
+
+```text
+python tools/validate_json.py
+PASS
+```
+
+Every positive fixture was accepted.
+
+Every negative fixture was rejected for the intended reason.
+
+`git diff --check` produced no output.
+
+Reviewed commit:
+
+```text
+bc54d6b4ce10d098916823b6a79f72b39d9c7703
+Harden Trainlog v1 exchange contract
+```
+
+The pushed GitHub mirror was read back and the review changes were verified.
+
 ## Gate decision
 
-Review #1 does not itself mark Gate 0 as PASS.
+```text
+GATE_0_REVIEW_01=PASS
+GATE_0=PASS
+```
 
-Gate 0 becomes eligible for PASS after:
+Gate 0 is closed.
 
-1. the canonical local validation succeeds;
-2. the review is committed;
-3. the commit is pushed to Forgejo and GitHub;
-4. the mirrored repository is reviewed.
+The exchange format remains deliberately unfrozen:
+
+```text
+TRAINLOG_FORMAT_V1=DRAFT
+```
+
+Gate 1 is responsible for completing the remaining format decisions and
+freezing `TRAINLOG_FORMAT_V1`.
diff --git a/docs/roadmap.md b/docs/roadmap.md
index 7b76766..b2ae764 100644
--- a/docs/roadmap.md
+++ b/docs/roadmap.md
@@ -2,7 +2,14 @@
 
 ## Gate 0 — Project contract
 
-Status: VALIDATION PENDING — REVIEW #1
+Status: PASS
+
+Canonical result:
+
+```text
+GATE_0=PASS
+GATE_0_REVIEW_01=PASS
+```
 
 Deliverables:
 
@@ -26,7 +33,14 @@ Exit criteria:
 - semantic invariants are documented;
 - repository clean after commit.
 
-Gate 0 is not PASS until the review #1 validation commands pass in the canonical working tree and the resulting commit is pushed.
+Gate 0 passed after:
+
+- canonical local fixture validation succeeded;
+- `git diff --check` succeeded;
+- review commit `bc54d6b4ce10d098916823b6a79f72b39d9c7703` was pushed;
+- the GitHub mirror was independently read back and reviewed.
+
+Gate 1 is now the active gate.
 
 ## Gate 1 — Exchange format v1 freeze