cc-session-tools 0.13.0

Claude Code session management CLI tools (ccd, ccr, ccs, claude-code-usage, ccst) and hook library (cccs_hooks)

claude-code-session-tools

Claude Code on its own is great. But once you're running parallel sessions across a codebase, orchestrating subagents, or doing sustained work over days and projects, the overhead starts to compound: sessions with UUID names you can't recognise, working files scattered through your repo root, no idea where your token budget went, and nothing stopping a background agent from pushing to main while you're away.

CCST is an opinionated toolkit that addresses this directly. It keeps sessions named and findable, gives Claude a consistent place to write its working files, gates high-stakes actions behind a confirmation step, and tells you exactly what each model and project cost you.

Three concerns, one repo, for life on the Claude Code CLI:

1. Session management — start, resume, find, relocate, and delete Claude Code sessions from the shell, with tagged dated session directories that don't pollute your repo root.
2. Usage analytics — parse ~/.claude/projects/**/*.jsonl into tokens-and-dollars breakdowns by project, session, model, MCP server, plugin, and tool.
3. Hook library — Python package (cccs_hooks) providing Claude Code SessionStart / PreToolUse / PostToolUse / UserPromptSubmit / Stop hook implementations, invokable via ccst hooks run <name>.

The repo ships six CLIs, one shell helper, seven bundled skills, and eight bundled hooks:

CLIs and shell helper

	What it does
ccd <tag>	Start a new session with a pre-created cc-sessions/<date>-<tag>/ directory and a tagged display name.
ccr <fragment>	Resume an existing session by typing any substring of its name.
ccs [query]	Search across your sessions by name, file contents, or transcript messages. No query → list all sessions newest-first.
claude-code-usage	Multi-dimensional usage analytics CLI: query/group/filter by project, session, model, MCP server, plugin, tool, day/week/month/year. Reconciles dollar totals against ccusage.
ccst <noun> <verb>	Umbrella CLI for hook and skill management: install, uninstall, health-check, shell helpers, telemetry trim, global CLAUDE.md messaging block.
ccmsg <command>	Inter-session messaging CLI: send, deliver, read, list, claim, and archive durable messages between Claude Code sessions.
ccl (shell fn)	Shell function wrapping ccs for list-mode usage. Installed by ccst shell install.

Bundled skills (installed via ccst skills install)

	What it does
analyse-cc-usage	Wraps claude-code-usage. Lets a Claude Code session answer "how much have I spent on Opus this month?" without you typing the CLI yourself.
delete-sessions	Permanently deletes one or more sessions (cc-sessions dir + JSONL transcript + .tag file). Dry-run by default; requires an 8-digit confirmation code to execute.
find-claude-code-session	Wraps ccs. Lets a Claude Code session locate one of your prior sessions by name or content and offer a ccr command to resume it.
generate-8digit-code	Generates a cryptographically secure 8-digit confirmation code via secrets.randbelow. LLMs are statistically biased random number generators — this ensures gated-action codes are genuinely unpredictable.
list-empty-sessions	Wraps ccs --emptiness only. Finds sessions you never actually typed in — accumulate from accidental ccd invocations or abandoned starts.
move-session	Move, rename, or move+rename a session while keeping its ~/.claude/projects/<encoded-cwd>/<uuid>.jsonl transcript resumable.
send-session-message	Guides recipient choice, message composition, and confirmation when sending an inter-session message via ccmsg send.

Bundled hooks (installed via ccst hooks install)

	What it does
session-tag (SessionStart)	Writes a <uuid>.tag file so claude-code-usage can map session UUIDs to human-readable names.
prompt-guard (UserPromptSubmit)	Scans incoming prompts for credential shapes and injection patterns before they reach the model.
last-screenshot (UserPromptSubmit)	Resolves your newest screenshot for the >lss token and injects its path. Requires CCST_SCREENSHOT_DIR.
bash-security-review (PreToolUse)	Tiered Bash command security review with an allowlist cache and LLM fallback.
confirm-8digit (PreToolUse)	Blocks a configurable set of high-stakes tool calls unless the user repeats back an 8-digit confirmation code.
edit-write-audit (PostToolUse)	Audits file writes for sensitive paths and checks that WORKLOG.md is being maintained.
session-end (Stop)	Nudges you to commit uncommitted changes and update WORKLOG.md when a session ends.
messaging-deliver (SessionStart + UserPromptSubmit)	Sweeps ~/.claude/cc-messages/ for messages addressed to this session and injects a compact digest as additional context. Handles auto-read, read-receipts, first-claim-wins claims, and 14-day archival without prompting.

See CHANGELOG.md for a full version history. See TODO.md for known follow-up work (including the notify-user skill integration).

If you've ever tried to remember which 1f4a8b3c-... UUID is the session where you were debugging that flaky test last Tuesday, or wondered which project burned through last week's Opus budget, this is for you.

Installation

Prerequisites

• Python 3.11+ (3.12+ recommended)
• The claude CLI on your $PATH. Install it first via the official Claude Code instructions and verify with claude --version.
• ccusage (optional) - if on $PATH, claude-code-usage reconcile cross-checks dollar totals against it. Skipped gracefully if missing.
• ripgrep (optional) - ccs --contents prefers rg; falls back to threaded Python grep if missing.

Install and set up

Easiest path — run the bundled script from a local clone:

git clone https://github.com/raffishquartan/claude-code-session-tools.git
cd claude-code-session-tools
bash install-everything.sh

install-everything.sh installs the CLIs (via uv or pipx, whichever is present), then symlinks the skills, merges the hooks, adds the ccl shell function, and registers the inter-session-messaging block in ~/.claude/CLAUDE.md. It runs ccst doctor at the end so you can see the health check immediately. Re-running is safe — every step is idempotent.

Options: --from-source reinstalls from the local clone rather than PyPI. --upgrade forces an upgrade of an existing install.

Note: install-everything.sh handles steps 1–5 of setup. Step 6 — adding broader CCST guidance to your global ~/.claude/CLAUDE.md (session management, 8-digit gate, etc.) — is interactive and must be run separately afterwards. See Configure your global CLAUDE.md below.

Manual path — step by step:

# 1. Install the package (choose one)
uv tool install cc-session-tools          # recommended
# pipx install cc-session-tools           # alternative

# 2. Install bundled skills, hooks, and the ccl shell function (each command is
#    idempotent — safe to re-run after upgrades)
ccst skills install --apply               # symlinks skills into ~/.claude/skills/
ccst hooks install --apply                # merges all bundled hooks into ~/.claude/settings.json
ccst shell install --apply                # adds ccl() to ~/.bashrc and ~/.zshrc

# 3. Verify everything is wired up
ccst doctor

# 4. Add CCST guidance to ~/.claude/CLAUDE.md (see Configure your global CLAUDE.md below)
#    This is required: without it, Claude Code sessions won't know to use CCST's
#    CLIs and skills, and the 8-digit gate won't have an action list to enforce.

After ccst shell install --apply, open a new shell (or source ~/.bashrc) to activate ccl.

Installing from source (pre-release or offline):

git clone https://github.com/raffishquartan/claude-code-session-tools.git
cd claude-code-session-tools
uv tool install .

Installing from a local clone: if you keep a local clone for development or to stay on the latest commit, refresh the global install with:

uv tool install ~/repos/claude-code-session-tools

Do NOT run uv tool install from inside a git worktree. That overwrites the global install's source pointer with the worktree path, which breaks all six CLIs when the worktree is deleted. Use uv run pytest to test inside a worktree, and run uv tool install ~/repos/claude-code-session-tools from outside the worktree after merging.

Upgrade

# 1. Upgrade the package (choose one)
uv tool upgrade cc-session-tools          # recommended
# pipx upgrade cc-session-tools           # alternative

# 2. Pick up any new bundled skills, hooks, and shell helpers
ccst skills install --apply
ccst hooks install --apply
ccst shell install --apply

# 3. Verify
ccst doctor

After ccst shell install --apply, re-source your shell rc file to pick up any updated ccl() function:

source ~/.bashrc   # bash
source ~/.zshrc    # zsh

Configure your global CLAUDE.md

This is the final required setup step — not included in install-everything.sh because it is interactive. Without it, Claude Code sessions have no guidance to use CCST's CLIs or skills, and the 8-digit confirmation gate has no action list to enforce.

Add CCST-aware guidance to your global ~/.claude/CLAUDE.md so Claude Code sessions know about the session-management tools and which actions require an 8-digit confirmation gate.

The easiest way is to run the bundled bootstrap prompt:

cd ~/repos/claude-code-session-tools && \
  claude -p "Check that you are executing with the claude-code-session-tools repository as your cwd. If you are not then exit. If you are then use this file as your prompt: docs/global-claude-md-bootstrap-prompt.md"

This prompt will:

1. Detect which CCST CLIs, skills, and hooks are installed.
2. Propose standard additions to your ~/.claude/CLAUDE.md — pointers to ccs/ccd/ccr/ccl, guidance to invoke the bundled skills (find-claude-code-session, move-session, list-empty-sessions, delete-sessions, analyse-cc-usage, generate-8digit-code), and a section explaining the 8-digit confirmation hook.
3. Interactively ask you which classes of high-stakes action you want gated (push-to-remote, force-push, PR merges, branch deletion, financial transactions, sending external messages, etc.) and write your choices into a ## 8-digit gated actions section.
4. Write the additions idempotently (re-running the prompt replaces the block, not appends).

If you prefer to edit ~/.claude/CLAUDE.md by hand, the suggested additions are:

• Use ccs (or ccl) to list sessions, ccr to resume, ccd to start a new one — do not start new sessions inside the running one.
• When the user wants to find a prior session, invoke the find-claude-code-session skill.
• When the user wants to relocate or rename a session, invoke the move-session skill.
• When the user wants to clean up never-used sessions, invoke list-empty-sessions then delete-sessions (8-digit gated).
• When the user wants usage analytics, invoke the analyse-cc-usage skill.
• When you need an 8-digit confirmation code for a gated action, invoke generate-8digit-code — never invent a number yourself.
• Ask before pushing to remote, merging PRs, deleting branches, or taking other high-stakes actions — the 8-digit confirmation hook is the mechanism.

Why bother?

Claude Code stores each session as a ~/.claude/projects/<encoded-cwd>/<uuid>.jsonl transcript and exposes them through claude --resume. That works, but the picker shows untagged sessions in opaque order, the working files for a session sprawl into your repo root, and there's no built-in way to grep across past conversations or see where your tokens went.

These tools add:

1. A tagged, dated session directory under <project>/cc-sessions/<YYYYMMDD>-<tag>/ with working/ and out/ subdirs - the convention Claude Code's session memory hooks expect when you want scratch space and deliverables that don't pollute your repo.
2. Resume-by-fragment so you can type ccr flaky instead of scrolling through the picker.
3. List and search so ccs (no args) shows all local sessions newest-first, ccl wraps it for convenience, and ccs --contents --global "GraphQL retry" finds every conversation that mentioned it.
4. Usage analytics so claude-code-usage query --since 2026-04-01 --group-by project,model answers where the spend went.
5. Skill wrappers so the Claude Code agent can do all of the above on your behalf when you ask in natural language.

Configuration: where do your sessions live?

ccd refuses to start a session if your current working directory isn't a direct child of one of your configured session roots. This sounds annoying but turns out to be a feature: it stops you from accidentally starting a session in /tmp or in ~, and it lets ccr/ccs find sessions across your projects without you telling them where to look.

Roots are configured via two environment variables - both optional, but you'll want at least one:

CLAUDE_SESSION_TOOLS_REPO_ROOT - the loose root

Point this at the directory whose direct children are your projects (the typical case is ~/repos):

export CLAUDE_SESSION_TOOLS_REPO_ROOT="$HOME/repos"

A "session root" means: if $REPO_ROOT/foo/ exists, then cd ~/repos/foo && ccd my-tag is allowed and creates ~/repos/foo/cc-sessions/20260509-my-tag/. Sessions started two levels deep (~/repos/foo/sub/) are rejected unless you pass --force.

Under the loose root the only naming rule is no spaces in the tag. Tag suffixes can be anything else: bugfix-7, redesign, try-out-thing.

CLAUDE_SESSION_TOOLS_PROJ_ROOT - the strict (namespaced) root

Pointing at this is opt-in. It's useful if you keep a separate directory for "Claude Code project" workspaces (think one folder per long-running theme, like ~/cc-claude-code/migration/, ~/cc-claude-code/oneshot/):

export CLAUDE_SESSION_TOOLS_PROJ_ROOT="$HOME/cc-claude-code"

Under the strict root, two extra rules apply:

1. Project directory names must match [a-z0-9]+ - lowercase, no dashes, no underscores.
2. Tag suffixes must start with <project-name>- followed by a descriptive label.

So in ~/cc-claude-code/oneshot/, ccd oneshot-config-cleanup is fine but ccd config-cleanup is rejected with a friendly error. The strict root also enables ccd's Levenshtein typo prompt: if you type oneshet-foo, it offers to correct it to oneshot-foo.

You can configure either, both, or neither. With neither set, you'll need ccd --force to start any session, and ccr/ccs won't find anything.

Why two roots, and which should I use?

	REPO_ROOT (loose)	PROJ_ROOT (strict)
Where you point it	A directory you already use for code, e.g. ~/repos	A purpose-built directory for Claude Code workspaces, e.g. ~/cc-claude-code
Naming conventions	None beyond no-spaces	Project name [a-z0-9]+, tag <project>-<label>
Typo protection	Off	On (Levenshtein-checked against project name)
Best for	Day-to-day work in existing repos	Long-running, themed Claude Code projects you want kept tidy

Most users only need REPO_ROOT. Configure PROJ_ROOT later if you find yourself wanting tighter conventions for a specific subset of work.

Session management CLIs

ccd - start a session

cd ~/repos/myproject
ccd bugfix-flaky-test
# Creates  ~/repos/myproject/cc-sessions/20260509-bugfix-flaky-test/
#                                            working/
#                                            out/
# And launches `claude` with -n 20260509-bugfix-flaky-test (tagged display name).

Useful flags:

Flag	What it does
--dry-run	Print what would happen (session dir, launch command) without creating anything or launching claude.
--force	Skip the root check and any naming-convention checks (escape hatch for one-off invocations outside your roots).
--debug	Enable verbose debug output (CCX_DEBUG=1).

Anything after the tag is forwarded to claude verbatim, so ccd my-tag --model opus works.

ccr - resume by fragment

ccr flaky        # resumes whichever session has "flaky" in its name
ccr 20260509     # resumes whichever session was started on that date

If multiple sessions match, ccr shows a numbered picker (1-9/0) if stdin is a TTY and there are 10 or fewer candidates; otherwise it prints them and exits. If exactly one matches, it execs claude --resume <basename> with the right working directory.

Useful flags:

Flag	What it does
--include-orphans	Also consider sessions whose cc-sessions/ directory is missing or has been cleaned up (resume by transcript UUID only).
--debug	Enable verbose debug output (CCX_DEBUG=1).

ccs - search and list

# List all sessions (no args → list mode)
ccs                                        # newest-first, current project
ccs --global                               # all configured roots

# Search
ccs flaky                                  # name search in current project
ccs flaky --global                         # name search across all configured roots
ccs "GraphQL retry" --contents             # full-text search of working/out files
ccs "GraphQL retry" --messages             # full-text search of JSONL transcripts
ccs "GraphQL retry" --contents --messages --global  # combined, all projects

# Filter
ccs flaky --since 2026-04-01               # only sessions from April 2026 onwards
ccs --emptiness only                       # only empty sessions (no user messages)
ccs --emptiness exclude                    # exclude empty sessions
ccs flaky --sort newest                    # explicit sort (default)
ccs flaky --sort oldest

Results are ordered newest-first by session start date by default. --contents shows one line of context around each match; --messages searches the Claude transcript JSONL files and surfaces matching turns. Every run prints a session-count footer on stderr: ccs: searching N sessions (M empty, K hook) in <scope>.

Useful flags:

Flag	What it does
--name	Search session basenames (the default; explicit opt-in).
--contents	Search text files inside each session's working/ and out/ directories.
--messages	Search Claude transcript JSONL files in ~/.claude/projects/.
--global	Search across all configured roots, not just the current project.
--emptiness {only,exclude,any}	Filter by whether a session has any user-typed messages. Default: any.
--since DATE	Only sessions started on or after DATE. Accepts YYYYMMDD, YYYY-MM-DD, 7d (days ago), 2w (weeks ago), 1m (months ago).
--before YYYYMMDD	Only sessions started before DATE.
--days N	Only sessions started within the last N days.
--sort {newest,oldest}	Sort order (default: newest).
--exclude-hooks	Hide hook-security-check sessions from results.
--json	Output results as a JSON array.
--null	Output null-delimited basenames (for xargs -0).
--debug	Enable verbose debug output (CCX_DEBUG=1).

ccl - list sessions (shell function)

ccl is a shell function installed by ccst shell install --apply. It wraps ccs in list mode:

ccl              # list all sessions in current project, newest-first
ccl --global     # list across all configured roots
ccl --emptiness only  # list only empty sessions

After install, activate it with source ~/.bashrc (or open a new shell).

Usage analytics CLI

claude-code-usage - tokens and dollars by every dimension you care about

The CLI parses your ~/.claude/projects/**/*.jsonl transcripts into a Pandas DataFrame (mtime-keyed Parquet cache means subsequent runs are fast), splits per-tool tokens evenly across tool_use blocks, and lets you slice the result.

Five subcommands:

	What it does
query	Multi-dimensional filter + group-by, output as markdown / CSV / JSON. The workhorse.
report	Render a full multi-section markdown report (project / model / time-bucket breakdowns at once).
children	List child sessions (hook-security-review, subagent dispatches) of a given parent session.
warm-cache	Populate or refresh the Parquet cache without producing output.
reconcile	Compare our totals against ccusage's authoritative figures, so we know the numbers are right.

A few examples:

# Total spend last month, grouped by project (top 10 by cost)
claude-code-usage query --since 2026-04-01 --until 2026-04-30 --group-by project --top 10

# Where Opus tokens went this week, by session
claude-code-usage query --since 2026-05-04 --model opus --group-by session

# How often each MCP server gets used, across the last quarter
claude-code-usage query --since 2026-02-01 --group-by mcp --sort token_total

# Daily spend trend for one project
claude-code-usage query --project myproject --group-by day --format csv

# Full report of last calendar month
claude-code-usage report --since 2026-04-01 --until 2026-04-30

# Cross-validate against ccusage
claude-code-usage reconcile --since 2026-04-01

Run claude-code-usage <subcommand> --help for the full grammar. A few flags worth knowing:

• --exclude-hooks strips out the bash-security-review.sh hook sessions, which would otherwise distort per-session cost breakdowns by ~$1.60 each.
• --include-children (when grouping by session) folds child-session tokens and cost into the parent row.
• --session-format {name,uuid,both} controls how the session column renders - by display name (default), by UUID, or both.

Bundled skills

The repo ships seven Claude Code skills, designed to be symlinked into ~/.claude/skills/. They're thin wrappers around the CLIs so a Claude Code session can invoke them on your behalf in response to natural-language prompts.

Install all seven at once with ccst skills install --apply (see Install and set up above).

find-claude-code-session

Wraps ccs. Triggers on prompts like "find my session about X", "did I work on foo before", "what session was I in when Y". Constructs the right ccs invocation, escalates from local to global search if the local hit list is empty, and presents results as ccr <fragment> commands you can paste.

move-session

Moves, renames, or move+renames a session directory while keeping the JSONL transcript resumable. Triggers on "move session to", "rename my session", "this session belongs in a different folder". Dry-run by default - you must pass --execute for any filesystem change. Validates source and destination against the same rules as ccd, copies the session directory tree, rewrites JSONL cwd fields to the destination path, and appends a tombstone record to the source JSONL so claude --resume on the old session explains where it went.

analyse-cc-usage

Wraps claude-code-usage. Triggers on usage questions: "how much have I spent on Claude Code", "tokens used this week", "which project costs the most", "Opus vs Sonnet", "any spike in usage recently". Picks the right subcommand and flags, runs it, and summarises the result in plain English.

list-empty-sessions

Wraps ccs --emptiness only. Triggers on prompts like "list empty sessions", "find sessions I never used", "which sessions are empty", "show abandoned sessions". Reformats the output with a count summary and two copy-pasteable follow-up commands: one ccr <basename> line to resume, and one delete-sessions <basenames...> line for bulk removal.

delete-sessions

Permanently deletes one or more sessions. Triggers on "delete session", "remove empty sessions", "clean up sessions". Inputs must be explicit session basenames — the user or the list-empty-sessions skill must supply them. Pre-flight checks confirm each session exists and is not the currently running session. Dry-run by default; requires --execute plus an 8-digit confirmation code for actual deletion. Deletes the cc-sessions/<basename>/ directory, the JSONL transcript, the .tag file, and optionally the ~/.claude/tasks/<encoded>/ task directory.

Note: the 8-digit confirmation in delete-sessions is an inline prompt (not a reuse of the cccs_hooks.confirm_8digit PreToolUse hook). The hook guards tool calls; the script guards its own execution.

See docs/design.md for the full design and CLI contract.

Inter-session messaging

ccmsg lets Claude Code sessions send durable, addressed messages to one another. Messages are stored as markdown-with-frontmatter files under ~/.claude/cc-messages/ — on-disk, human-readable, and auditable. Each message carries a recipient (session tag, project name, or free-text description), a sender, a timestamp, and an optional list of attachment paths.

ccmsg subcommands

Subcommand	What it does
send	Compose and route a new message to a session, project, or description.
deliver	Sweep the store for messages addressed to this session and emit a compact digest; used by the delivery hooks.
read	Print the full body and metadata of one message by ID.
list	List messages in compact form (ID, recipient, status, subject).
claim	Claim a description-addressed message so no other session picks it up (first-claim-wins).
archive	Manually archive a message without reading it.

Delivery hooks

Two hooks drive automatic delivery without any extra steps:

• messaging-deliver on SessionStart — runs a full sweep of the message store when a session opens, injecting a digest of all pending messages as additional context.
• messaging-deliver on UserPromptSubmit — runs an incremental sweep before each prompt, picking up any messages that arrived since the last check.

Both hooks handle auto-read, read-receipts, first-claim-wins claims, and 14-day archival transparently.

Install both hooks with ccst hooks install --apply (they are included in the standard bundle).

send-session-message skill

The send-session-message skill guides you through choosing a recipient, composing the message body, and confirming before ccmsg send is invoked. Useful when you want Claude to act as a dispatcher rather than constructing the ccmsg send command manually.

ccst claude-md install/uninstall

ccst claude-md install --apply adds a managed proactive-messaging block to your global ~/.claude/CLAUDE.md, telling every Claude Code session how to recognise and act on incoming message digests. ccst claude-md uninstall --apply removes it. Both commands are idempotent.

The install-everything.sh script runs ccst claude-md install --apply automatically as part of the standard installation sequence.

Hook library (cccs_hooks)

The cccs_hooks Python package provides Claude Code hook implementations. Install via uv tool install cc-session-tools or pipx install cc-session-tools to make the hook library available. Hooks are invoked through ccst hooks run <name>.

Modules

Module	Hook event	What it does
cccs_hooks.telemetry	—	Writes structured JSONL to ~/.claude/hooks/fires.jsonl; used by other modules. Rotates at 10 MB (numbered slots: fires.jsonl.1, .2, .3).
cccs_hooks.transcript	—	Walks parent session transcript JSONL; shared by confirm_8digit.
cccs_hooks.confirm_8digit	PreToolUse	8-digit confirmation guard for gated tools.
cccs_hooks.cache	—	SHA-256 command cache (CSV); used by bash_security_review.
cccs_hooks.bash_security_review	PreToolUse	Tiered Bash security review with cache.
cccs_hooks.edit_write_audit	PostToolUse	Sensitive-path + WORKLOG audit.
cccs_hooks.prompt_guard	UserPromptSubmit	Credential/injection pattern guard.
cccs_hooks.session_end	Stop	WORKLOG/uncommitted-changes nudge.
cccs_hooks.session_tag	SessionStart	Writes <uuid>.tag so claude-code-usage can map session UUIDs to ccd name tags (see Session tag hook).
cccs_hooks.last_screenshot	UserPromptSubmit	Resolves the newest screenshot for the >lss token and injects its path (see Last screenshot hook).
cccs_hooks.messaging_deliver	SessionStart + UserPromptSubmit	Sweeps ~/.claude/cc-messages/ for messages addressed to this session and injects a compact digest as additional context (see Inter-session messaging).

Running hooks via ccst hooks run <name>

Hook scripts invoke the dispatcher via ccst rather than calling python3 -m cccs_hooks.* directly. This means CCST only needs to be installed via uv tool install or pipx install - the hook modules do not need to be importable by the system Python. The shim contract is:

exec ccst hooks run <name> <<< "$INPUT"

Where <name> is one of:

Verb	Module
bash-security-review	cccs_hooks.bash_security_review
confirm-8digit	cccs_hooks.confirm_8digit
prompt-guard	cccs_hooks.prompt_guard
edit-write-audit	cccs_hooks.edit_write_audit
session-end	cccs_hooks.session_end
session-tag	cccs_hooks.session_tag
last-screenshot	cccs_hooks.last_screenshot
messaging-deliver	cccs_hooks.messaging_deliver

The dispatcher reads the event payload from stdin, calls the matching module's main(), and propagates its exit code.

Session tag hook

cccs_hooks.session_tag is a SessionStart hook that writes a small tag file when a session is created via ccd <tag>:

• File written: ~/.claude/projects/<encoded-cwd>/<session_id>.tag
• File content: the ccd name tag (e.g. oneshot-add-uuid-for-better-usage-mapping)
• If CLD_SESSION_TAG is not set (i.e. the session was not started by ccd), the hook exits silently.

Claude Code stores each session as ~/.claude/projects/<encoded-cwd>/<uuid>.jsonl. The display name (set by ccd via claude -n) survives only in ephemeral PID files that disappear when the process exits. The .tag file gives claude-code-usage and other tools a persistent, stable mapping from UUID to human name - so --session-format name shows oneshot-add-uuid-for-better-usage-mapping instead of sess-8f3a2c1d.

Last screenshot hook

cccs_hooks.last_screenshot is a UserPromptSubmit hook that lets you refer to your most recent screenshot with the token >lss ("last screenshot") instead of finding and typing its path.

When a submitted prompt contains a standalone >lss token, the hook finds the newest image in your screenshot directory and injects its absolute path as additional context, with a note telling Claude how to decide whether you want it read. The hook only ever injects text - the image enters context only if Claude then Reads the path. So you can also talk about the feature ("what does the >lss hook do?") without an image being attached.

• Token match: >lss matches unless glued to a letter or digit. Matches >lss, >lss?, (>lss is handy), loss at >lss.; does not match >lssfoo.
• Selection: newest *.png / *.jpg / *.jpeg by file mtime.
• Staleness: if the newest screenshot is older than 10 minutes, the injected note warns you to confirm it is the one you meant.

Configuration (required): set the CCST_SCREENSHOT_DIR environment variable to the folder where your screenshots are saved - e.g. in the env block of ~/.claude/settings.json:

"env": {
  "CCST_SCREENSHOT_DIR": "/path/to/your/Screenshots"
}

If >lss is used while CCST_SCREENSHOT_DIR is unset (or not a directory), the hook prints a visible warning to stderr telling you to set it. The hook never blocks and always exits 0.

Running modules directly (debugging only)

Each module is also runnable as a Python CLI if you want to bypass the dispatcher and have cccs_hooks importable on sys.path (e.g. inside an activated venv, or when installed via uv tool install cc-session-tools):

python3 -m cccs_hooks.telemetry log --help
python3 -m cccs_hooks.bash_security_review  # reads JSON from stdin
python3 -m cccs_hooks.prompt_guard          # reads JSON from stdin

Hook management CLI (ccst)

The ccst umbrella CLI provides hook and skill management, shell helper install, and system health checks.

ccst hooks install

Merges hook entries from a source settings.json into ~/.claude/settings.json. With no --source, auto-discovers the bundled config/hooks-bundle.json and installs all eight default hooks.

# Dry run (default) - shows what would be added
ccst hooks install

# Write all bundled hooks
ccst hooks install --apply

# Install one specific hook from the bundle
ccst hooks install --hook session-tag --apply

# Install from a custom source file
ccst hooks install --source /path/to/custom-hooks.json --apply

Matching is by event type + matcher + command string; already-present hooks are never duplicated. The target file is written atomically (.tmp swap).

ccst hooks uninstall

Remove hook entries from ~/.claude/settings.json. Dry-run by default.

# Show what would be removed
ccst hooks uninstall

# Remove all bundled hooks
ccst hooks uninstall --apply

# Remove one specific hook
ccst hooks uninstall --hook session-tag --apply

ccst hooks run <name>

Run a Claude Code hook by name. See the table above for the supported names.

ccst skills install

Symlink all bundled skills into ~/.claude/skills/.

# Dry run (default) - shows what would be created or skipped
ccst skills install

# Write the symlinks
ccst skills install --apply

# Replace wrong-target or conflicting symlinks
ccst skills install --apply --force

ccst skills uninstall

Remove skill symlinks from ~/.claude/skills/. Refuses to remove non-symlinks unless --force. Dry-run by default.

# Show what would be removed
ccst skills uninstall

# Remove all bundled skill symlinks
ccst skills uninstall --apply

# Remove one specific skill
ccst skills uninstall --skill move-session --apply

ccst shell install

Append a ccl() shell function to ~/.bashrc and/or ~/.zshrc between sentinel markers. Idempotent — re-running replaces the existing block.

# Dry run (default) - shows what would be added
ccst shell install

# Write the ccl() function
ccst shell install --apply

After running --apply, re-source your shell rc file to activate the updated ccl() function:

source ~/.bashrc   # bash
source ~/.zshrc    # zsh

ccst shell uninstall

Remove the sentinel-bracketed ccl() block from shell rc files.

ccst shell uninstall --apply

ccst claude-md install

Add or update the inter-session-messaging block in the global ~/.claude/CLAUDE.md. Idempotent — re-running replaces the existing block rather than appending.

# Dry run (default) - shows what would be added or replaced
ccst claude-md install

# Write the block
ccst claude-md install --apply

ccst claude-md uninstall

Remove the managed messaging block from ~/.claude/CLAUDE.md. Dry-run by default.

ccst claude-md uninstall --apply

ccst doctor

Run a full health check: PATH for all six CLIs, env vars (REPO_ROOT/PROJ_ROOT), ~/.claude/settings.json JSON validity, expected hook registrations present, skill symlinks correct and pointing at the installed source, version drift between installed ccst and the latest release on PyPI.

ccst doctor           # checks everything, including PyPI version check
ccst doctor --no-pypi # skip the network version check (useful in CI)

Exit 0 if all checks are OK. Exit 1 if any check is WARN or FAIL.

ccst telemetry trim

Prune old hook telemetry data from ~/.claude/hooks/fires.jsonl.

# Remove entries older than 30 days, or if the file exceeds 5 MB
ccst telemetry trim --max-age-days 30 --max-size 5

Telemetry is also rotated automatically at 10 MB (numbered slots fires.jsonl.1/.2/.3).

How it interacts with Claude Code's task lists

Claude Code lets multiple sessions share a single task list if they all set the same CLAUDE_CODE_TASK_LIST_ID environment variable. ccd and ccr derive this from the project layout:

• If your cwd is a direct child of a configured root (e.g. ~/repos/myproject), the task list ID is set to the project directory name (myproject). All sessions started in ~/repos/myproject share one task list.
• If your cwd is anywhere else (or both env vars are unset and you used --force), no task list ID is set and the session gets a private task list.

This means you can pick up a task created in yesterday's session from today's session in the same project, without any extra setup.

Typo protection (strict root only)

When you start a session under the strict (PROJ_ROOT) root, ccd checks whether your tag's first dash-separated term looks like a typo of the project directory name (Levenshtein distance ≤ 2):

cd ~/cc-claude-code/oneshot
ccd oneshet-fix-bug
ccd: 'oneshet' looks like a typo of project folder 'oneshot' (Levenshtein 1).
ccd: Start session with tag 'oneshot-fix-bug' instead? [y/N]

A second prompt fires if your first term is far from the current project name and far from every sibling project under PROJ_ROOT - in that case ccd offers to prepend the current project name. This behaviour is intentionally off under the loose root.

Sessions on disk

Each session directory looks like:

cc-sessions/20260509-bugfix-flaky-test/
  working/      # scratch files, notes, WORKLOG.md - whatever you want
  out/          # deliverables you might keep or hand off

Add cc-sessions/ to your project's .gitignore if you don't want session artefacts tracked.

Development

git clone https://github.com/raffishquartan/claude-code-session-tools.git
cd claude-code-session-tools
uv sync --extra dev
uv run pytest

Tests run on Python 3.11, 3.12, and 3.13 (see .github/workflows/ci.yml). CI also includes an install-check job that runs uv tool install . and verifies all six CLIs start up correctly - the direct guard against the editable-install/worktree failure mode.

When working in a git worktree: test your changes with uv run pytest or uv run python -m cc_session_tools.cli.ccd - do not run uv tool install from inside a worktree. After merging, run uv tool install ~/repos/claude-code-session-tools (or uv tool install cc-session-tools if installed from PyPI) to update the global install.

Limitations and caveats

• Linux and macOS only. Windows is not tested; the tools assume POSIX paths and os.execvpe-style process replacement.
• The session-management CLIs shell out to claude via os.execvpe. If claude isn't on $PATH, ccd and ccr will fail with the standard "command not found" error.
• claude-code-usage reads from ~/.claude/projects/ and writes a Parquet cache under ~/.cache/claude-code-usage/parquet/ (overrideable via --projects-dir and --cache-dir). Pricing data is loaded from data/pricing.json shipped with the package, refreshed lazily from LiteLLM upstream with a 7-day TTL.
• The strict-root convention is opinionated. If you don't want it, just leave CLAUDE_SESSION_TOOLS_PROJ_ROOT unset.

Licence

MIT - see LICENSE.