feat: Add session-file-validator plugin for stale image detection on resume#20662
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CameronImmesoete wants to merge 1 commit intoanthropics:mainfrom
Open
feat: Add session-file-validator plugin for stale image detection on resume#20662CameronImmesoete wants to merge 1 commit intoanthropics:mainfrom
CameronImmesoete wants to merge 1 commit intoanthropics:mainfrom
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…resume Adds a new plugin that validates file content when resuming sessions. When images were read in a previous session, the plugin warns Claude about potentially stale cached data and instructs it to re-read files when asked about them. Key features: - SessionStart hook with resume matcher - Parses transcript to find image file reads - Checks if files still exist on disk - Injects context warning about cached content - Security: path traversal protection, symlink validation Co-Authored-By: Claude <[email protected]>
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@claude PTAL 🤖 Generated with Claude Code |
mrmrcode
approved these changes
Feb 10, 2026
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Summary
This PR adds a new plugin that validates file content when resuming sessions. When images were read in a previous session, the plugin warns Claude about potentially stale cached data and instructs it to re-read files when asked.
Problem: When using
--resumeto continue a session, Claude may describe cached image content from the original session instead of reading new files. This is because image data is stored as base64 in the transcript and replayed on resume without re-reading the actual files.Solution: A SessionStart hook that:
Changes
plugins/session-file-validator/.claude-plugin/plugin.json- Plugin metadataplugins/session-file-validator/hooks/hooks.json- Hook configuration (SessionStart with resume matcher)plugins/session-file-validator/hooks/session-resume-validator.py- Main validation logicplugins/session-file-validator/README.md- Documentationplugins/README.md- Added plugin to the directory tableSecurity
Path.resolve()and pattern checksTest Plan
Related
--resumesession shows wrong image content when reading new files with unique paths #15285🤖 Generated with Claude Code