Repository history, compiled for Codex

Stop guessing what
your agent should know.

Explore a reproducible, source-linked RepoDNA Pack without an API key. Self-host RepoDNA with your own key when you are ready to analyze a repository and run repository-specific evaluation.

4fixture rules

8fixture evidence links

+65fixture score gain

repodna / public demoNO HOSTED API KEY

$ repodna compile ./repository

indexed 5 history snapshots before holdout boundary

linked 8 sources to 4 candidate rules

generated AGENTS.md + agent skill

ran 4-arm deterministic evaluation

BARE35

VERIFIED PACK100

+65

01 / DEMO

Explore a reproducible evidence pack.

This public demo makes no hosted model calls. Self-host to analyze your own public repository.

HistoryDocs, commits, CI

EvidenceSource-linked decisions

ContextAGENTS.md + Skill

Holdout evalSame task, four arms

PromoteVerified rules only

02 / PROVENANCE · DEMO FIXTURE

Every rule has receipts.

fixture: repodna-labs/hidden-contractc71a9e2

fixture-verified rule

Route failures use AppError

Throw AppError with a stable code for expected API failures; do not throw a generic Error.

Evidence chain2 sources

src/errors/AppError.tscommit 4e62a10

refactor(api): make error codes observable

A historical migration replaced generic route errors.

src/api/projects/projects.test.tserror contract

expect(error).toBeInstanceOf(AppError)

The contract is enforced by tests.

source guidance holdout promoted

03 / COUNTERFACTUAL

Same task. Same base. Better context.

bundled reproducible fixture

HOLDOUT TASKAdd the order-cancellation slicebase hc-8176fb766efd

CONDITIONCOMPOSITE SCORE

Promotion requires no test regression and a higher deterministic rule score.

RepoDNA Pack · verified100/100

Tests6/6

Rules4/4

Lint errors0

Extra files0

grader outputscore=100 tests=6/6 rules=4/4

04 / SHIP

Install tested context,
not another generated essay.

Persistent repository rules stay concise in AGENTS.md. The repeatable evidence and validation workflow lives in a native Codex Skill. Everything is reviewable and versionable.

Bundled demo pack ready to export

hidden-contract-repodna-pack.zip fixture verified

AGENTS.mdalways-on map

.agents/skills/repo-dna/

SKILL.mdworkflow

references/evidence.md8 links

scripts/validate.mjsdeterministic

manifest.jsonprovenance + eval

Fixture promotion gate passed4/4 rules improved or preserved the bundled holdout score

GroundedNo evidence, no rule.

MeasuredNo uplift, no promotion.

NativeAGENTS.md + Codex Skill.

Safe by defaultRead-only public analysis.