Claude-skill-registry cass-search

Search past AI sessions with CASS. Use when looking for past solutions, searching session history, finding how something was done before, or when the user mentions "cass", "history", or "past sessions".

install

source · Clone the upstream repo

git clone https://github.com/majiayu000/claude-skill-registry

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/cass-search" ~/.claude/skills/majiayu000-claude-skill-registry-cass-search && rm -rf "$T"

manifest: skills/data/cass-search/SKILL.md

CASS (Cross-Agent Session Search)

Search and retrieve content from past AI coding sessions.

When This Applies

Signal	Action
"How did we do this before?"	`cass search`
"Find past solutions"	`cass search`
Looking for patterns	`cass search`
View specific session	`cass view`
Today's activity	`cass timeline`

CRITICAL RULE

Always use

--robot

or
--json
. Never run bare
cass
.

Bare

cass

launches a TUI that will hang AI agents.

Search

# Basic search
cass search "query" --robot --limit 5

# Lean output (path, line, agent)
cass search "query" --robot --fields minimal

# With summary (title, score)
cass search "query" --robot --fields summary

# Token budget
cass search "query" --robot --max-tokens 2000

# Wildcard prefix
cass search "auth*" --robot

# Workspace-specific
cass search "query" --workspace "/path/to/project" --robot

View & Expand

# View full session
cass view /path/to/session.jsonl --json

# Expand specific line with context
cass expand /path -n 42 -C 3 --json

Timeline

# Today's sessions
cass timeline --today --json

# Last week
cass timeline --since 7d --json

# Recent activity
cass timeline --days 7 --json --limit 10

Export

cass export /path/session.jsonl --format markdown
cass export /path/session.jsonl --format json

Indexing

# If search returns nothing
cass index --full

# Health check
cass health

Output Formats

--robot-format jsonl     # Streaming line-delimited JSON
--robot-format compact   # Minimal output

Query Tips

Query Type	Example
Exact phrase	`"error handling"`
Wildcard	`auth*`
Multiple terms	`database migration`
Recent	Add `--since 7d`

Quick Reference

cass search "query" --robot --limit 5      # Basic search
cass search "query" --robot --fields minimal   # Lean output
cass view /path.jsonl --json               # View session
cass expand /path -n 42 -C 3 --json        # Expand with context
cass timeline --today --json               # Today's activity
cass index --full                          # Rebuild index

When to Use CASS vs Other Tools

Need	Use
Past session content	CASS
Learned patterns/rules	cass-memory ( `cm` )
Current codebase	Warp-Grep or Grep
Web documentation	Exa
Task graph	bv