diff --git a/PLAN.md b/PLAN.md
index 42bc831..cbe32d4 100644
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+++ b/PLAN.md
@@ -296,7 +296,7 @@ Only one file genuinely forces LFS, and it is not a dataset:
 Full automation:
 
 - [x] Audit dashboard workflow ([#20](https://github.com/QuantEcon/data-lectures/issues/20), added 2026-07-17): `.github/workflows/audit-dashboard.yml` rebuilds the full-universe data audit + migration tracker from the 8 lecture repos' `main` (push to main / weekly / dispatch) and deploys it with the published tree to Pages. Strict mode fails the build on an unannotated data reference or a `migration.yml` status the scan contradicts
-- [ ] PR validation: manifest schema check + per-dataset invariant tests (expected columns/dtypes, row-count floor, date-range recency, no all-NaN columns, overlap-window agreement with the previous vintage) on every PR touching data. The schema decisions these tests force — column patterns for wide files, `known_nulls` exact-vs-ceiling, a canonical dtype vocabulary — are researched in [#14](https://github.com/QuantEcon/data-lectures/issues/14)
+- [ ] PR validation: manifest schema check + per-dataset invariant tests (expected columns/dtypes, row-count floor, date-range recency, no all-NaN columns, overlap-window agreement with the previous vintage) on every PR touching data. The schema decisions these tests force — column patterns for wide files, `known_nulls` exact-vs-ceiling, a canonical dtype vocabulary — have their own issues under the [#14](https://github.com/QuantEcon/data-lectures/issues/14) tracker: [#120](https://github.com/QuantEcon/data-lectures/issues/120) column patterns, [#121](https://github.com/QuantEcon/data-lectures/issues/121) `known_nulls`, [#122](https://github.com/QuantEcon/data-lectures/issues/122) dtype vocabulary; the shared manifest-driven `validate()` and this workflow are [#119](https://github.com/QuantEcon/data-lectures/issues/119)
 - [x] Retrofit `builders/business_cycle.py` to the four-stage builder contract — **done 2026-09-01**, with the two provenance dumps moved out of the published tree to `provenance/` ([#13](https://github.com/QuantEcon/data-lectures/issues/13)). Its `validate()` is the first to face a *revised* upstream: it bounds the overlap window (5 pp) and prints the revision summary rather than asserting equality, which is the review surface the refresh-as-PR workflow below will use. It previously had fetch/transform/write but no validate stage. Builder architecture and a copy-able template: [#14](https://github.com/QuantEcon/data-lectures/issues/14)
 - [x] Scheduled refresh workflow for dynamic datasets — **landed 2026-09-01** as `.github/workflows/refresh-snapshots.yml`, manifest-driven rather than cron-per-class: a weekly run asks `scripts/snapshots.py due` which `dynamic-snapshot` datasets have their cadence elapsed (or are `diverged`, or were never refreshed), runs each builder in place, stamps the manifest (`retrieved`, `sha256`, `integrity.upstream: verified`, `date_range.end`), regenerates the catalog, and opens a PR on `refresh/<stem>` whose body is the builder's overlap summary. Nothing auto-merges; the first consumer is `business_cycle_data.csv`, not UNRATE — the pilot's order inverted once the World Bank file turned out to be the one already here
 - [x] Weekly sources-alive canary: fetch + validate, no commit, opens an issue on failure — **landed 2026-09-01** as the `canary` job of the same workflow: every dynamic snapshot's builder runs with `--out-dir`, and a failure opens or updates one `upstream-break` issue classified by exit code (2 = the data broke the contract, a human; anything else = the fetch, a retry). Covers the live APIs only as their snapshot twins land here — the 23 live-API lectures without a twin are still guarded by nothing but their own CI