Rosa Del Mar

Daily Brief

Issue 95 2026-04-05

Targeted Secret Scanning Workflow And Detection Coverage

Issue 95 Edition 2026-04-05 5 min read
General
Sources: 1 • Confidence: High • Updated: 2026-04-12 10:01

Key takeaways

  • scan-for-secrets is a Python tool that takes provided secrets and scans a specified directory for them.
  • A tool named scan-for-secrets version 0.1 has been released.
  • The author publishes transcripts of local Claude Code sessions using the claude-code-transcripts tool and is concerned that secrets such as API keys could appear in those logs.
  • Users can define a recurring set of secrets to protect by listing commands that output those secrets in a ~/.scan-for-secrets.conf.sh file.
  • scan-for-secrets scans not only for literal secrets but also for common encodings such as backslash-escaped or JSON-escaped forms.

Sections

Targeted Secret Scanning Workflow And Detection Coverage

  • scan-for-secrets is a Python tool that takes provided secrets and scans a specified directory for them.
  • scan-for-secrets scans not only for literal secrets but also for common encodings such as backslash-escaped or JSON-escaped forms.
  • If the -d option is omitted, scan-for-secrets defaults to scanning the current directory.

Ai-Assisted Delivery Of Small Security Tools Via Readme-Driven Tdd

  • A tool named scan-for-secrets version 0.1 has been released.
  • The author built scan-for-secrets using README-driven development, specifying behavior in the README and having Claude Code implement it using red-green TDD.

Accidental Secret Exposure Via Published Ai-Coding Transcripts

  • The author publishes transcripts of local Claude Code sessions using the claude-code-transcripts tool and is concerned that secrets such as API keys could appear in those logs.

Automation Of Recurring Secret Sets Via Shell-Configured Commands

  • Users can define a recurring set of secrets to protect by listing commands that output those secrets in a ~/.scan-for-secrets.conf.sh file.

Unknowns

  • What interfaces exist for supplying secrets to scan-for-secrets (CLI flags, stdin, environment variables), and what are the exact expected formats?
  • Which encodings beyond backslash-escaped and JSON-escaped are supported, and is the behavior formally specified by tests?
  • What are the tool’s expected performance characteristics and file-handling behavior (large repositories, binary files, symlinks, excluded paths)?
  • What is the false-positive/false-negative profile when scanning typical transcripts/logs, and are there recommended thresholds or workflows for triage?
  • How is ~/.scan-for-secrets.conf.sh intended to be secured, and what guidance exists to prevent the config mechanism from becoming a new secret-leak vector?

Investor overlay

Read-throughs

  • Rising need for pre-publication controls for AI coding transcripts and other logs, with targeted secret matching as a practical workflow to reduce accidental key exposure.
  • Opportunity for developer workflow tools to add targeted secret scan steps alongside linting and tests, especially for artifacts like transcripts and generated JSON where escaping can hide leaks.
  • Increased attention to operational security of local developer automation, since shell-based secret enumeration can streamline scans but also introduces new handling and storage risks.

What would confirm

  • Evidence of adoption such as recurring use in publish pipelines for transcripts, CI usage examples, or community reports that it prevented real leaks in logs or transcripts.
  • Expanded, test-backed documentation of supported encodings and file handling, indicating reliability beyond literal matching and demonstrating a maintained detection surface.
  • Guidance and tooling around securing the config mechanism, such as clear practices for protecting the shell config and avoiding it becoming a new leak vector.

What would kill

  • Reports of high false positives or false negatives when scanning typical transcripts and logs, making triage burdensome or undermining trust in the workflow.
  • Performance or file handling limitations in large repositories, binaries, symlinks, or excluded paths that block practical integration into real projects.
  • Security concerns that the shell-configured command approach commonly exposes secrets itself, leading users to avoid the workflow or creating new incidents.

Sources

  1. 2026-04-05 simonwillison.net