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Sweep every QuantEcon repository for a reader of business_cycle_data.csv #134
Description
The one check from #127 (§1.2 and §6.4) that the original session skipped outright and the validating session could only do in part. business_cycle_data.csv was served publicly from 2025-02 until the rename on 2026-09-07; a reader of the old name anywhere in the org is a reader-facing regression to file, not a caveat.
Already covered (zero hits)
Depth-1 clones searched with git grep -I business_cycle_data and git ls-files: the eight audit repos (lecture-python-intro, lecture-python-programming, lecture-python.myst, lecture-python-advanced.myst, lecture-jax, lecture-dp, lecture-wasm, continuous_time_mcs), lecture-stats, lecture-python.zh-cn, lecture-intro.zh-cn, lecture-python-programming.{zh-cn,fr,fa,ml} (including .ml's gh-pages), the seven .notebooks mirrors, tom-econ370-2025, 2026-tom-course, test-actions-lecture-intro, python-lecture-sandpit.myst, QuantEcon.lectures.code, quantecon-notebooks-python, meta, website, skills, qeps, workspace-lectures, status-projects — 34 repositories — plus all 15 branch tips of lecture-wasm (there is no wasm branch and no repoint/* branch; the non-default branches are datasets/track-a-remainder, track-x-orphans, ci/data-url-guard, gh-pages and eleven theme/docs branches). In this repository the name survives only as dated history (PLAN.md:27,34, migration.yml:839, scripts/audit_annotations.yml:48, AGENTS.md:58, builders/business_cycle.py:20, the manifest header). lecture-dp.notebooks and lecture-python-intro.fa do not exist.
To do, from a machine with gh
gh search code 'business_cycle_data org:QuantEcon'— the token is distinctive, so code search works here; expect only this repository's history notes.- The pass search cannot do:
gh repo list QuantEcon --limit 400 --json nameWithOwner,defaultBranchRef,isArchived, then for every repositorygh api "repos/{owner}/{repo}/git/trees/{default_branch}?recursive=1" --jq '.tree[].path'filtered forbusiness_cycle_data(case-insensitive). Note truncated trees (truncated: true) and fall back to a clone for those. Record the repository count swept. - Any hit outside this repository: open a regression issue here naming the repository, path and line, and leave the VALIDATION: independent review of the 2026-09-07 schema-decisions, rename and manifest-driven validator work #127 boxes open until it is repointed or shown dead.
Exit criterion
The sweep result (repository count, hits or none) is posted on #127 and its §1.2 and §6.4 boxes are ticked, or a regression issue exists.
Activity
mmcky commentedon Sep 7, 2026
Swept 2026-09-07. 286 repositories enumerated, 283 swept, zero readers of the old name outside this repository.
The enumeration reconciles with the org itself —
gh api orgs/QuantEcongives 215 public + 71 private = 286 — so private and archived repositories were in scope and were swept. 283 were swept twice: a recursive Trees-API pass over every default branch (34,179 entries,truncated: falseon all 283, so the depth-1 fallback this issue anticipated was never needed) and a depth-1 clone withgit grepfor content, which is what covers the 26 archived repositories and 3 forks that GitHub code search does not index. The 3 not swept —test-cli,numfocus,quantecon-book-dp— are empty:size: 0, zero branches, and the Trees API returns HTTP 409Git Repository is empty.Zero path hits for
business_cycle_dataanywhere in the org. Fourteen content hits, every one inside this repository and every one the dated history step 1 predicted:PLAN.md27, 34, 301, 308, 309, 324, 343;AGENTS.md:58;builders/business_cycle.py:20;manifest-schema.yml49 and 228;migration.yml:839;scripts/audit_annotations.yml:48; and thegdp_growth_annual.csv.ymlheader.gh search code 'business_cycle_data org:QuantEcon'independently returned 9 lines, all from here. No regression issue to open.An adversarial re-run then attacked the coverage and closed three gaps beyond what this issue asked for. It re-derived the enumeration and spot-checked five random repositories — including a private one and an archived one — by re-running the Trees call and matching both the full path set and the root tree SHA, confirming they were genuinely inspected. Then: every branch of the eight audit repositories and this one (268 branches, 43,118 entries) plus a full-history all-refs content grep of those eight (883 refs, including
lecture-wasm's 16 and itsgh-pages) — the only path hits are 12, every one in this repository on stale pre-rename branches;gh-pagesorg-wide (39 repositories, 18,079 files), which neither this issue's plan nor the sweep had covered and which is where the published site actually lives; and the org's only two submodules, both inlecture-mapping, which neither the Trees API nor a non-recursive clone expands. All zero.Named rather than closed: the non-default branches of roughly 245 low-risk repositories, fork PR heads outside the audit repositories, and any out-of-org or non-GitHub reader — unmeasurable in principle, so a bound rather than a proof. Recorded as residuals on #127.
#127 §1.2 and §6.4 are ticked.
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