pitwall

README

pitwall

The instrument panel for a fleet of coding agents.

When you run four or five Claude Code agents at once, the hard part stops being the code. It becomes: which one is blocked on me, what is this costing, what did they leave behind, and which of my habits is burning the budget.

pitwall answers all four from data already on your disk. One binary, no dependencies, nothing leaves the machine.

$ pitwall

pitwall  Mon 12:05

  agents  1 WAITING · 2 DONE · 1 WORKING
          ▲ WAITING mds-0e     asks: Drop the legacy index before backfill?
          ✔ DONE    fleety-c8  Shipped to prod. 63 drivers imported, tests…
  spend   $254.74 today   $254.74 in the last 5h   burn $50.95/h
  git     44 worktrees   30 removable (2.5 GB)   1 holding unsaved work

pitwall fleet · burn · tree · coach

The part that is actually new

Everything above is telemetry. pitwall coach is the opinion:

$ pitwall coach

pitwall coach  $17,015.77 across 3373 prompts · 2026-07-30 – 2026-08-31

  what a prompt bought  prompts  spend      share
  execute               889      $8,763.63  52%   wrote or changed code
  investigate           1883     $8,094.75  48%   read, searched or ran things — changed nothing
  talk                  601      $157.39     1%   no tool calls at all

1. "max" carries your spend but "xhigh" delivers more per dollar
   $3,125.98 · 18% of spend · association, not a controlled test
     max      $14111   2320 prompts  $2.42 per code change
     high      $2603    598 prompts  $3.07 per code change
     xhigh      $301     83 prompts  $1.13 per code change
     full gap would be $7532; scaled to $3126 because "xhigh" has only 83 prompts behind it
     → run a week at xhigh and compare — pitwall records the answer either way

2. Sessions restart from zero in repositories with no primer
   $3,121.83 · 18% of spend · association, not a controlled test
     the first 3 prompts of a session are 23% of all spend
     without a primer: $7.84 per opening prompt, 53 tool calls each
     with one:        $1.55 per opening prompt, 18 tool calls each
     → pitwall primer fleety   — drafts a CLAUDE.md from what past sessions discovered

3. Answers that end in a question, followed by a one-line reply
   $2,365.85 · 14% of spend
     171 round trips; each one pays for a full turn to ask and another to resume
     → state the decision up front: which files, what done looks like, what not to touch

Findings are ranked by what they cost, and anything that is a correlation rather than a controlled measurement says so on its own line.

Requirements

Claude Code	Any recent version. pitwall reads what it writes to ~/.claude, so there must be some history there to read.
OS	macOS, Linux or Windows. The menu bar app is macOS only.
git	Only for pitwall tree. Everything else works without it.
Go 1.23+	Only if you build from source.
Xcode command line tools	Only for the menu bar app.

Nothing else. The binary is statically linked and carries no dependencies.

Install

Homebrew (macOS and Linux)

brew install sur1cat/tap/pitwall

sur1cat/tap is this project's own tap rather than homebrew-core, so the prefix is part of the command. One brew tap sur1cat/tap up front lets you drop it afterwards.

Go

go install github.com/sur1cat/pitwall@latest

Installs into $(go env GOPATH)/bin, which is ~/go/bin by default. Add it to your PATH if it is not there already.

Script

curl -fsSL https://raw.githubusercontent.com/sur1cat/pitwall/main/install.sh | sh

Downloads the release build for your platform into ~/.local/bin and tells you if that is not on your PATH. Set PREFIX to put it elsewhere:

curl -fsSL .../install.sh | PREFIX=/usr/local/bin sh

By hand

Take the archive for your platform from releases, unpack it, and move pitwall onto your PATH. This is the route for Windows, where the archive is a .zip.

From source

git clone https://github.com/sur1cat/pitwall
cd pitwall
make build            # ./bin/pitwall
make install          # into $GOBIN, or ~/go/bin

Check it worked

pitwall version
pitwall                # the glance screen

If the second command prints "No usage found", Claude Code has not written anything to ~/.claude/projects yet, or CLAUDE_CONFIG_DIR points somewhere else — pitwall honours that variable.

First run

In this order:

pitwall                # what is happening right now
pitwall burn           # what it has been costing, by model and effort level
pitwall perms          # which of your permission rules can never match
pitwall tree           # what your agents left behind on disk
pitwall coach          # which of your habits costs the most

coach reads every transcript on the first run, which takes a few seconds on a large corpus; after that it is served from a cache and is instant. Everything above only reads. The two commands that change anything — pitwall perms fix and pitwall tree gc — say so, are a dry run by default, and back up whatever they touch.

Wire it into Claude Code

Three optional pieces, each independent of the others.

A status line, so every session shows what it is spending:

pitwall install          # --print to see the change first, --remove to undo

This adds a statusLine entry to ~/.claude/settings.json and backs up the previous file next to it.

The plugin, which adds a /pitwall command and a hook that offers a primer when you open an unprimed repository:

claude plugin marketplace add sur1cat/pitwall
claude plugin install pitwall

The menu bar app, so none of this needs a terminal open:

brew install sur1cat/tap/pitwall-bar
pitwall-bar

or from a checkout:

make bar && open bar/build/PitwallBar.app

The app is compiled on the machine that installs it rather than shipped as a notarised bundle. That is deliberate: an app downloaded from the internet carries a quarantine attribute that an ad-hoc signature will not clear, while one built locally starts without argument. The cost is that Xcode's command line tools are needed.

To have it come back after a reboot, add PitwallBar.app to System Settings → General → Login Items.

In the menu bar

Six tabs behind the click — Status (who needs you, today's spend, plan left, worktrees, with a button that cleans them up), Coach (the findings, rendered natively), Rules (the permission rules that can never match, and a button that removes them), Projects (per-project primer and effort level), Prompts, and Setup (what the menu bar shows, notifications, language). Clicking an agent brings its terminal tab to the front. Notifications fire once when an agent asks a question or finishes, and never while it is working. Details in bar/README.md.

Update and uninstall

brew upgrade pitwall                     # Homebrew
go install github.com/sur1cat/pitwall@latest   # Go

brew uninstall pitwall pitwall-bar
rm ~/.local/bin/pitwall                  # if installed by the script
pitwall install --remove                 # take the status line back out
rm -rf ~/.claude/pitwall                 # pitwall's cache and quota readings

pitwall keeps nothing else. Removing ~/.claude/pitwall costs you the scan cache and the quota history behind the pace measurement; nothing else changes.

If something looks wrong

"No usage found" — Claude Code has written nothing to ~/.claude/projects, or CLAUDE_CONFIG_DIR points elsewhere.

Numbers cover less time than you expect — Claude Code deletes transcripts after cleanupPeriodDays, 30 by default. pitwall burn says so once the archive has reached that boundary. Raise it in ~/.claude/settings.json.

pitwall quota says it cannot read your plan — it needs the OAuth token Claude Code stored. On macOS that is in the Keychain and the system asks for permission once. CLAUDE_CODE_OAUTH_TOKEN also works.

The menu bar app will not open — if it was downloaded rather than built locally, macOS quarantines it. Build it from source, which is what the formula does.

A worktree command finds nothing — pitwall tree needs git on the PATH.

Surfaces

Command	What it answers
pitwall	Everything at a glance, in under two seconds
pitwall fleet	Which agent is waiting, working, or done — and wait blocks until one needs you
pitwall burn	What usage costs, by model, effort level, project, session and day
pitwall perms	Which permission rules can never match, and perms fix removes them
pitwall tree	Which git worktrees your agents left behind, and which hold unsaved work
pitwall quota	How much of your plan is left, from Anthropic, with a projection
pitwall coach	Where your spend actually goes and what would change it
pitwall primer	A draft CLAUDE.md built from what past sessions learned about a repo
pitwall focus	Brings an agent's terminal tab to the front
pitwall lint	Checks a prompt against the shapes that needed fewest follow-ups
pitwall tree prep	Copies the local config a fresh worktree is missing

Each has --help. Everything takes --json.

fleet — who needs you

WAITING is derived rather than reported: a tool call with no result while the agent is not running means it is parked on a human — a question, or a permission prompt. pitwall fleet wait turns that into a shell primitive:

pitwall fleet wait && say "an agent needs you"
pitwall fleet watch --exec 'terminal-notifier -message "$PITWALL_NAME: $PITWALL_STATE"'

quota — how much is actually left

The most common complaint about Claude Code is hitting a limit with no warning. Claude Code itself knows the answer: it calls a usage endpoint that returns the utilisation of both windows. pitwall calls the same one, with the credential Claude Code already stored.

$ pitwall quota

  window   used               resets in  at this pace
  5 hours  ▮▮▮▯▯▯▯▯▯▯▯▯  33%  1h03m      lasts the window
  rolling  ▮▮▮▮▮▮▮▯▯▯▯▯  65%  70h23m     runs out in 52m  (pace of the last 1h37m)

The projection extrapolates the pace used so far inside the window, and says what it extrapolated from — a burst right after a reset produces a short projection, and you should be able to see that rather than be alarmed by it. It stays silent when the window would reset before the pace ran it out.

The rolling window is labelled weekly by Anthropic but is observed to reset every 72 hours. That is not documented, so pitwall says so instead of implying otherwise.

pitwall effort --guard uses this number: when either window passes a threshold, it lowers the effort level new sessions start at, and restores it when the pressure drops.

burn — what it costs, priced properly

Cache writes are not input tokens: a 5-minute-TTL write costs 1.25× the input rate, a 1-hour write 2×, a cache read 0.1×. Claude Code records the TTL split per request, and pitwall uses it — which matters when 98% of your tokens are cache reads. Messages replayed by session forks are counted once. Models with promotional launch pricing are billed at the rate that applied on the day.

Subagents are counted and shown separately. Their transcripts live in a subagents/ directory, they carry isSidechain, and on this machine they are 23% of the spend across nearly as many messages as the main conversation — a fan-out cost that most trackers skip entirely and that nobody notices until it has its own line.

On a subscription these numbers are the value you consumed, not an invoice, and every screen says so.

Spans are written the way people write them: --since 30d, --since 2w, --since 12h, or a bare --since 30 meaning days.

perms — the rules that can never match

Claude Code's "Yes, and don't ask again" writes a rule into .claude/settings.local.json. Over a year that accumulates, and a large share of what accumulates cannot do anything. pitwall perms reads every settings file that carries permission rules and sorts them by why they fail, following Claude Code's documented matching behaviour rather than guesswork:

• secret — a credential is written into the rule text. Reported as a count and a file, never echoed: printing it would copy the secret into a terminal, a scrollback buffer and very likely another transcript.
• fragment — a comment line, or a piece of a multi-line block saved with its newlines encoded. Not a command, so it never matches one.
• unmatchable — the rule text contains a shell separator. Claude Code matches each subcommand independently, so such a rule can never match.
• ignored — Claude Code skips it at load: an mcp__ rule with parentheses, a rule on a tool's primary content field such as Bash(command:rm *), or an allow glob not anchored to a literal server.
• never-consulted — a path rule on Write, NotebookEdit, Glob or MultiEdit. File access is only checked against Read and Edit rules.
• wildcard-inside — a * before the end. In Bash(git * main) the * stands in for the subcommand, which includes -c, and git -c runs a program you name.
• shadowed and duplicate — a broader or identical rule already covers it.
• one-off — no wildcard at all, so it matches that one command forever.

It also shows which single prefix rule would replace how many one-offs, and stops there: widening a permission is a decision for the person who owns the repository, so pitwall prints the arithmetic rather than acting on it.

pitwall perms fix cleans up what cannot work. It is a dry run until you add --write, it copies every file into ~/.claude/pitwall/perms-backups before changing it, and it never touches managed settings. Two limits are deliberate:

• It never widens a permission. Repairing Write(src/**) to Edit(src/**) would grant access that the broken rule does not grant today, so an allow rule is reported and a deny or ask rule is corrected. The same holds for Bash(command:rm *) and every other ignored form.
• Working rules stay. A literal rule such as Bash(npm run build) is clutter, not a fault; removing it means Claude Code asks again. --drop-one-offs removes them if that is what you want.

Everything else in the file survives byte for byte, in its original key order, so the diff you review is the change and nothing else.

tree — the worktrees left behind

Six states, and gc only removes what it can prove is safe. Anything holding uncommitted work is salvaged first — committed to its own branch, pinned behind refs/pitwall/salvage/*, and archived as a patch — before the worktree is removed. If the rescue fails, the worktree stays.

primer — a starting point for repos that have none

Start with the list, which ranks every unprimed repository by what its cold starts cost above the rate your primed ones manage:

$ pitwall primer --all

  project      sessions  $/opening prompt  at stake
  tenderai     26        $18.48            $1,261.71
  fleety       87        $5.00               $886.27
  mds          30        $8.79               $607.25

  $3,104.29 across 10 repositories

Then draft one, or all of them with --all --write:

pitwall primer ~/src/fleety

reads every past session in that repository and drafts a CLAUDE.md from what agents actually did: the commands that get run (go test, golangci-lint run, npx vitest, psql), the directories that get touched, the files that keep being opened. It is observed behaviour, not documentation — the draft leaves blanks for the intent no transcript can tell you.

The plugin does this automatically: when a session opens in a git repository with no CLAUDE.md, a SessionStart hook injects a compact version of the same summary. It stays quiet when a CLAUDE.md exists or the repository has too little history to be worth the tokens.

What pitwall deliberately does not do

It does not switch your effort level for you. Claude Code hooks receive the current effort as read-only input; there is no field in any hook's output that can change the model or the reasoning level, and PreModelSwitch can only observe a switch you already asked for. Anything claiming to auto-tune effort is either editing your settings behind your back or not doing it at all.

What pitwall does instead is make those 264 manual /effort decisions informed: it shows what each level has actually cost you per unit of work, so the choice is one keystroke made on evidence rather than on feel.

It also never touches a running session, never proxies your traffic, and never sends anything anywhere.

Where the data comes from

~/.claude/sessions/*.json      live sessions: pid, cwd, busy/idle, name
~/.claude/projects/**/*.jsonl  transcripts: usage, effort, tools, prompts, worktree records
git worktree / status / rev-list

Everything is read-only apart from pitwall's own caches, the salvage archives tree gc writes, the local configuration tree prep copies into a worktree, and the files install, primer --write and effort --apply create.

One command uses the network. pitwall quota calls https://api.anthropic.com/api/oauth/usage — the endpoint Claude Code calls for the same purpose — with the OAuth credential Claude Code already stored (macOS keychain, or ~/.claude/.credentials.json, or CLAUDE_CODE_OAUTH_TOKEN). macOS asks once for permission to read it. Nothing is sent anywhere else, and no other command touches the network. Readings are cached for 180 seconds because that endpoint rate limits hard, with exponential backoff when it does.

Transcripts are pruned by Claude Code after about a month, so burn and coach describe the retained window, not all time. Both print the range they measured, and both warn once the archive has actually reached the boundary and is being trimmed — the default is cleanupPeriodDays: 30, and raising it in ~/.claude/settings.json is the only way to keep a longer history. Prompts in ~/.claude/history.jsonl are not pruned on the same schedule, so questions outlive the answers they produced.

Scans are cached per file on size and modification time: a first pass over a couple of gigabytes takes a few seconds, and every pass after that is instant.

Other agent tools

pitwall reads Claude Code's format. The internals are split so that a second adapter (Cursor, Codex, Aider, Gemini CLI) would only need to produce the same Session, Record and Exchange types — but no such adapter exists yet, and one will not be written speculatively. If you want your tool supported, open an issue with a sample of what it writes to disk.

License

MIT

Documentation

Overview

Command pitwall is the instrument panel for a fleet of coding agents: what they are doing, what they cost, what they left behind, and which of your habits is spending the most.