fix(debt): track Deno removal as a probed integer, and un-collide the audit name

.machine_readable/Debtfile.a2ml

@@ -86,3 +86,23 @@ forgotten.
 - tri: control
 - tracking: hyperpolymath/standards#308
 - accepted-until: 2027-01-01
+
+### deno-residue
+- description: Deno residue in this repository after the Bun ruling. `governance-reusable.yml` still runs `denoland/setup-deno`, which INSTALLS DENO ON EVERY ESTATE REPO ON EVERY RUN; `deno-ci{,-reusable}.yml` still ship the failing `deno / Deno CI`; `scripts/check-ts-allowlist.deno.js` is a worked Deno example in scripts/; and `docs/migrations/npm-to-deno-template/` is a live recipe pointing repos AT the retired runtime. Owner ruled Deno REMOVED and Bun permanent (said three times, reaffirmed 2026-08-07). Must reach 0. Excludes */bindings/deno/, which is interop for OTHER people's Deno code and a separate question.
+- probe: git grep -lE "denoland/setup-deno|deno run|deno test|deno fmt|deno lint" -- ".github/workflows/*.yml" "scripts/*" | wc -l
+- count: 4
+- ceiling: 4
+- severity: medium
+- policy: remediable
+- tri: substitute
+- accepted-until: 2026-11-01
+
+### deno-artefacts
+- description: Files that exist only to serve Deno — the deno-ci workflow pair, the compiled check-ts-allowlist.deno.js, and the npm-to-deno migration template. Deleting these is the completion of the Bun migration, not a precondition of it. Excludes */bindings/deno/.
+- probe: git ls-files ".github/workflows/deno*" "scripts/*deno*" "docs/migrations/npm-to-deno-template/*" | wc -l
+- count: 6
+- ceiling: 6
+- severity: medium
+- policy: remediable
+- tri: substitute
+- accepted-until: 2026-11-01

Debtfile.adoc → docs/audits/2026-08-07-estate-cicd-debt.adoc

@@ -1,13 +1,22 @@
 // SPDX-License-Identifier: MPL-2.0
 // SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
-= Debtfile — estate CI/CD debt register
+= Estate CI/CD debt audit — 2026-08-07
 :toc: macro
 :toclevels: 2
 :sectanchors:
 
-Things *found and measured but not fixed*, carried between sessions.
+Things *found and measured but not fixed* during the 2026-08-07 estate CI/CD
+sweep.
 
-This is the human-readable companion to
+NOTE: This is an *audit*, not a Debtfile. The Debtfile is
+`.machine_readable/Debtfile.a2ml` — a probe-backed, monotone-decreasing integer
+register with its own spec (`docs/DEBTFILE-SPEC.adoc`), runner and CI ratchet.
+Countable items from this audit belong THERE, where the number can be
+re-measured instead of believed; items awaiting a ruling stay here. This file
+was briefly named `Debtfile.adoc` at the repository root, which collided with
+that mechanism — renamed to the `docs/audits/` convention.
+
+It is also the human-readable companion to
 `.machine_readable/agent_instructions/debt.a2ml`. Every item below states what
 was measured, when, and *what decision it is waiting on* — because most of what
 remains is not blocked on effort, it is blocked on a ruling.