TrustSight

Audits AUR PKGBUILDs before you update: catches careless malice and structural risk, and tells you what it can't verify.

The 30-second example

trustsight review

                        TrustSight Review
┏━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Package         ┃ Risk Score   ┃ Verdict                                   ┃
┃                 ┃              ┃                                           ┃
┡━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ chez-scheme-bin │   0/100      │ Version bump. No structural changes.      │
├─────────────────┼──────────────┼───────────────────────────────────────────┤
│ sketchy-pkg     │  35/100      │ R004 HIGH  Checksum disabled (SKIP).      │
│                 │              │ C003 INFO  Source URL changed without     │
│                 │              │            version bump.                  │
│                 │              │ SOURCE_BUCKET MEDIUM  New domain:         │
│                 │              │   sketchy-cdn.invalid (unknown).          │
│                 │              │ NOVELTY HIGH  Source URL first seen       │
│                 │              │   globally.                               │
│                 │              │ PINNING INFO  Source pinning: unpinned.   │
│                 │              │ Verdict: Checksum disabled; sources       │
│                 │              │   replaced with content from an unknown,  │
│                 │              │   never-before-seen domain.               │
├─────────────────┼──────────────┼───────────────────────────────────────────┤
│ obsidian-beta   │  15/100      │ INCONCLUSIVE. Only 2 prior observations;  │
│                 │              │ no high-severity signals from a cold DB.  │
└─────────────────┴──────────────┴───────────────────────────────────────────┘

The tiered evidence display is the differentiator: every signal (rule, bucket, novelty, pinning, verification) is shown with its contribution and severity. You see why the score is what it is.

What it catches / what it can't

Install

pipx install trustsight

On Arch Linux, pip install is blocked by the system Python's externally-managed-environment protection. Use pipx (above) or:

pip install --break-system-packages trustsight

AUR: trustsight (dogfood: TrustSight audits its own updates).

From source:

git clone https://github.com/emiliano-go/trustsight
cd trustsight
pip install -e .
# Or with pipx: pipx install .

Requires Python 3.10+.

Commands

How scoring works

Scoring is deterministic: same input always produces the same score. A core of 13 detection rules (R001 to R013), an expanded set (R039 to R059) calibrated against a 3,322-diff benign corpus, and 7 code-structure rules (C001 to C007) produce signals across four evidence tiers: A (structural, rules on PKGBUILD lines), B (priors/context, URL classification and forge trust), C (history/novelty, first-seen URLs and maintainers gated by observation count), and D (verification, checksums, PGP keys, GPG verify, which subtract from the score). The LLM is entirely optional and never calculates; it translates the deterministic breakdown into English, and verdict-integrity assertions gate its output. See scoring-philosophy.md.

Security model

TrustSight is evidence-producing, not proof-of-safety. It audits and does not install. The tool never runs the PKGBUILD, never executes extracted commands, and never modifies your system. Every finding is traceable to a specific diff line, URL, or novelty record. The output is a structured risk assessment to inform your decision, not a gate. See trust-model.md.

License

MIT. Deliberately permissive to encourage adoption, auditing, and fork-investigation by the Arch Linux and security communities.

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