61 lines
2.0 KiB
Fish
Executable File
61 lines
2.0 KiB
Fish
Executable File
#!/usr/bin/env fish
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# Copyright (C) 2026 Rootiest
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# SYNOPSIS
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# Invoked as a Claude Code session hook; reads JSON from stdin.
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#
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# DESCRIPTION
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# Hook script called by Claude Code on session start. Reads a JSON payload
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# from stdin, extracts the session_id field, and writes it to .claude_session
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# in the current directory. Ensures that file is excluded via .gitignore.
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# Sets the universal variable LAST_CLAUDE_SESSION for cross-terminal access.
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# Falls back to a no-op (emitting "{}") when python3 is unavailable
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# (Convention §6).
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#
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# ARGUMENTS
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# stdin JSON payload from Claude Code containing a "session_id" key
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#
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# RETURNS
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# 0 Always; emits "{}" to stdout as required by the hook contract
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#
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# EXAMPLE
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# echo '{"session_id":"abc123"}' | fish save_claude_session.fish
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# cat .claude_session # → abc123
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# echo $LAST_CLAUDE_SESSION # → abc123
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# 1. Read input and extract session ID
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# python3 parses the session_id out of the hook's JSON payload. If it is
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# unavailable we emit valid empty JSON and skip session tracking rather
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# than erroring (see AGENTS.md Convention §6).
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set -l input (cat)
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if not type -q python3
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echo '{}'
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exit 0
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end
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set -l sid (echo $input | python3 -c "import sys,json; print(json.load(sys.stdin).get('session_id', ''))")
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set -l session_file ".claude_session"
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if test -n "$sid"
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# 2. Save the session ID locally
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echo "$sid" >$session_file
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# 3. Smart .gitignore check
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# We check if git even knows about this file.
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# If 'git check-ignore' returns 1, it means the file is NOT ignored.
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if git rev-parse --is-inside-work-tree >/dev/null 2>&1
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if not git check-ignore -q $session_file
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# Append the filename to .gitignore
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echo -e "\n# AI Session IDs\n$session_file" >>.gitignore
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echo "Added $session_file to .gitignore"
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end
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end
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# 4. Update universal variable
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set -U LAST_CLAUDE_SESSION "$sid"
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end
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# MANDATORY: Every hook must output valid JSON
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echo '{}'
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