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developing-hooks

Guides development of Claude Code plugin hooks, including prompt-based and command hooks, hook events (PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification), matchers, output formats, and security practices. Activates when the user asks to create a hook, add event-driven automation, validate tool use, implement prompt-based hooks, block dangerous commands, or configure hooks.json.

71
SUSPICIOUS
Format: openclawScanner: v0.7.1Duration: 39msScanned: 2h ago · Mar 26, 10:57 PMSource →
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Category Scores

58
Permissions
75
Injection
95
Dependencies
35
Behavioral
95
Content
100
Code Safety

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Findings (14)

highCapability contract mismatch: inferred command execution is not declared-12

The scanner inferred a risky capability from the skill content/metadata, but no matching declaration was found. Add a declaration with a clear justification, or remove the behavior.

Content pattern: execute

→ Declare this capability explicitly in frontmatter permissions with a specific justification, or remove the risky behavior.

permissionsASST-03
highCapability contract mismatch: inferred file read is not declared-6

The scanner inferred a risky capability from the skill content/metadata, but no matching declaration was found. Add a declaration with a clear justification, or remove the behavior.

Content pattern: Reference Files

→ Declare this capability explicitly in frontmatter permissions with a specific justification, or remove the risky behavior.

permissionsASST-03
highCapability contract mismatch: inferred network access is not declared-6

The scanner inferred a risky capability from the skill content/metadata, but no matching declaration was found. Add a declaration with a clear justification, or remove the behavior.

Content pattern: https://docs.claude.com/en/docs/claude-code/hooks

→ Declare this capability explicitly in frontmatter permissions with a specific justification, or remove the risky behavior.

permissionsASST-04
highCapability contract mismatch: inferred documentation ingestion is not declared-10

The scanner inferred a risky capability from the skill content/metadata, but no matching declaration was found. Add a declaration with a clear justification, or remove the behavior.

Content pattern: references/

→ Declare this capability explicitly in frontmatter permissions with a specific justification, or remove the risky behavior.

permissionsASST-03
highUnrestricted mode activation detected-25

Found unrestricted mode activation pattern: "Enable Debug Mode"

### Enable Debug Mode

→ Remove unrestricted mode activation attempts. Skills must not bypass agent safety mechanisms.

injectionASST-01
highLocal file access detected-15

Found local file access pattern: "Reference Files"

### Reference Files

→ Treat local file browsing as privileged access. Restrict it to explicit user-approved paths and avoid combining it with unrestricted browser/session reuse.

behavioralASST-03
highLocal file access detected (inside code block)-15

Found local file access pattern: "references/"

- **`references/patterns.md`** - Common hook patterns (8+ proven patterns)

→ Treat local file browsing as privileged access. Restrict it to explicit user-approved paths and avoid combining it with unrestricted browser/session reuse.

behavioralASST-03
highLocal file access detected (inside code block)-15

Found local file access pattern: "`validate-write.sh`"

- **`validate-write.sh`** - File write validation example

→ Treat local file browsing as privileged access. Restrict it to explicit user-approved paths and avoid combining it with unrestricted browser/session reuse.

behavioralASST-03
highLocal file access detected (inside code block)-15

Found local file access pattern: "scripts/validate.sh"

"command": "bash ${CLAUDE_PLUGIN_ROOT}/scripts/validate.sh",

→ Treat local file browsing as privileged access. Restrict it to explicit user-approved paths and avoid combining it with unrestricted browser/session reuse.

behavioralASST-03
mediumCapability contract mismatch: inferred file write is not declared-8

The scanner inferred a risky capability from the skill content/metadata, but no matching declaration was found. Add a declaration with a clear justification, or remove the behavior.

Content pattern: Create hooks that activate conditionally by checking for a flag file

→ Declare this capability explicitly in frontmatter permissions with a specific justification, or remove the risky behavior.

permissionsASST-03
mediumEnvironment secret piping detected (inside code block)-5

Found environment secret piping pattern: "echo "$input" |"

tool_name=$(echo "$input" | jq -r '.tool_name')

→ Treat shell pipelines that pass secrets from environment variables as sensitive credential handling. Avoid exposing secret values to command histories or subprocess pipelines unless absolutely necessary.

behavioralASST-05
lowUnknown external reference-5

The skill references an unknown external domain which is classified as low risk.

https://docs.claude.com/en/docs/claude-code/hooks

→ Verify that this external dependency is trustworthy and necessary.

dependenciesASST-04
infoSafety boundaries defined

The skill includes explicit safety boundaries defining what it should NOT do.

Safety boundary patterns detected in content

→ Keep these safety boundaries. They improve trust.

contentASST-09
infoOutput constraints defined

The skill includes output format constraints (length limits, format specifications).

Output constraint patterns detected

→ Keep these output constraints.

contentASST-09