LH002 cohort

The ten repositories as fixed in brief.md before collection, with what each source returned for each. Every figure here is from a table in data/, read on 26 September 2026; the window is 2026-03-26T00:00:00Z to 2026-04-22T23:59:59Z. No repository was added, dropped or replaced after the brief was written. Contributor identities appear only as counts and classes; the pseudonymous per-author table is data/authors_pseudonymous.csv.

Membership and selection

Frame A is the 34 direct dependents of mcp 1.27.0 that Open Source Insights lists; frame B the 95 of mcp 1.26.0. The rule and the counts excluded at each step are in brief.md; the script is scripts/select_cohort.py and its full output, with every excluded package and the reason, is reproduced by running it.

Inclusion notes. Fork status could not be read: GitHub's REST API answered 403 through this session's proxy, and the proxy's rule is to report such a refusal, not route around it. Every repository here is the one its package's own metadata names, so none was chosen as a fork, but none is confirmed not to be one. R04's GitHub history begins on 2026-04-04 with a single commit holding the whole project, and its PyPI release of 2026-03-26 names a GitLab repository as its source (Open Source Insights, UNVERIFIED_METADATA); the nine days before are missing, not zero. R07's first commit in git, on 2025-12-09, is later than its first PyPI release, on 2025-11-17, so its earlier history is not on GitHub either; that falls before the window and does not affect its readings. No paths matched the vendored-content rule. Lockfiles are counted apart from other lines. R06's changed lines are 91 per cent JSON files (data/changed_lines_by_location.csv), which the tables keep visible rather than exclude.

Readings over the window

Sources: data/repo_summary.csv, data/pypi_releases_in_window.csv, data/tags_in_window.csv and data/mcp_state_window_start_end.csv. "Human account" means an author address at GitHub's noreply domain with no bot marker; "unknown" is every other author without a bot marker, which includes people who commit under a personal or work address. R00's release tag is not counted as a window tag because it is a lightweight tag and git gives it the date of its commit, 24 March.

Coverage by source

"Complete" means every commit reachable in September 2026 from a branch or tag; commits on branches deleted since are not in it (see LH002.md, Findings). Sources: data/software_heritage_coverage.json, data/depsdev_graphs_window_start_end.csv, data/gharchive_hour_vs_git.csv.