This release is a pre-release and may not be stable for production use.
Nauro Ballast
Context audit for coding-agent transcripts. Reads your local Claude Code and Codex CLI session logs and produces your context bill: what filled your context windows, where documented compactions happened, what survived them, and what did not.
Status: pre-release alpha. An open-source Nauro project (Apache-2.0).
What it does
nauro-ballast census: a share-safe census over~/.claude/projectsand~/.codex/sessions: sessions, composition by category, peak context sizes, documented compaction events, context wall-hits, and inferred session-boundary structure. Counts only; no transcript content in the output.nauro-ballast match: the absence matcher. For every documented compaction boundary it reconstructs the post-compaction context exactly as the harness defines it and reports, per pre-boundary message, what remained lexically reachable.
Claim discipline
Findings are tiered and the tiers are never pooled:
- DETECTED-ABSENCE (Claude Code documented boundaries): a message with no verbatim or near-verbatim match in the reconstructed context at the boundary. Lexical absence, reported as such; never a claim about model behavior. Re-supply later in the session is counted separately.
- AT-RISK (Codex): the compaction item is encrypted by design, so items not among the kept plaintext are reported as exposure, never as absence.
- INFERRED (both): heuristics (token discontinuities, rapid-successor sessions), always labeled.
Privacy
Fully local, offline, zero network calls, no account. The default report is share-safe:
counts, categories, and truncated identifiers only. Verbatim excerpts require an explicit
--with-excerpts flag and pass a redaction filter (keys, tokens, emails, paths) first.
Install
Not yet published. From a checkout:
uvx --from . nauro-ballast census
uvx --from . nauro-ballast match
Once published: uvx nauro-ballast census.
License
Apache-2.0.
1 maintainer
Metadata
1 maintainer
Release files for nauro-ballast 0.1.0.dev1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
|---|---|---|---|---|
| nauro_ballast-0.1.0.dev1.tar.gz | 19.5 kB | With provenance | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| nauro_ballast-0.1.0.dev1-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 39.2 kB
Release files / nauro_ballast-0.1.0.dev1.tar.gz
| Download URL | nauro_ballast-0.1.0.dev1.tar.gz |
|---|---|
| Size | 19.5 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
be90a20e2aa335565468c5387d2ac3ab933871831c5a831c624c8a64ae609586
|
|
BLAKE2b-256 checksum How to use checksums |
579e15a89c541bde9352c5807642028a51a7cec35599f1ea3dedf6cbb16ce27b
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/6.1.0 CPython/3.13.12
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Jul 6, 2026.
Transparency logRelease files / nauro_ballast-0.1.0.dev1-py3-none-any.whl
| Download URL | nauro_ballast-0.1.0.dev1-py3-none-any.whl |
|---|---|
| Size | 19.7 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
22d3767a79acecb01b6d7885d061cc58fbf1391324cac1f5018ea5e12ae0b2ea
|
|
BLAKE2b-256 checksum How to use checksums |
d400b9605af04842ac0243d48cee32053425327f346108e2db33cd8861091123
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/6.1.0 CPython/3.13.12
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Jul 6, 2026.
Transparency logSecurity for nauro-ballast 0.1.0.dev1
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
Full provenance
All 2 files in this release have been uploaded with provenance metadata.
Attestation for nauro_ballast-0.1.0.dev1.tar.gz
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Jul 6, 2026.
Transparency logA note on package security
PyPI is a repository for distributing packages, not a service for auditing them. While third-party security researchers and our staff do their best to detect and remove malicious packages, PyPI cannot guarantee the quality, security or suitability of any given package.
To learn more about protecting yourself from malicious actors, visit our package security documentation.
