Borrowing it
Nothing to install: this file belongs to atc-net/atc-claude-kanban. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/atc-net/atc-claude-kanban/main/CLAUDE.mdgit clone --depth 1 https://github.com/atc-net/atc-claude-kanbanWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/atc-net/atc-claude-kanban/claude-md)<a href="https://agentmods.dev/instructions/atc-net/atc-claude-kanban/claude-md"><img src="https://agentmods.dev/badge/instructions/atc-net/atc-claude-kanban/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/atc-net/atc-claude-kanban/claude-md"><img src="https://agentmods.dev/badge/instructions/atc-net/atc-claude-kanban/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.06243 | $0.06243 |
| Opus 5.5 | $0.02497 | $0.02497 |
| Sonnet 5.5 | $0.01249 | $0.01249 |
| Haiku 4.5 | $0.00624 | $0.00624 |
Grade A, and why
atc-claude-kanban CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
A .NET 10 dotnet tool that serves a real-time Kanban dashboard for monitoring Claude Code agent tasks, sessions, and subagents. It watches ~/.claude/ directories, broadcasting changes via Server-Sent Events to a browser-based board.
Build & Test
# Build (Release mode enforces all analyzer rules as errors)
dotnet build -c Release
# Run tests (287 tests across 17 test classes)
dotnet test
# Run the dashboard locally
dotnet run --project src/Atc.Claude.Kanban -- --open
# Custom port
dotnet run --project src/Atc.Claude.Kanban -- --port 8080
# Point at a synthetic fixture instead of ~/.claude (used to regenerate README
# screenshots without real session data — see scripts/seed-demo-fixture.ps1)
dotnet run --project src/Atc.Claude.Kanban -- --dir <path>
Repository Structure
src/Atc.Claude.Kanban/
Program.cs # Entry point, CLI args, auto-port discovery, WebApplication wiring
CliOptions.cs # Parsed CLI argument record
EndpointDefinitions/ # Atc.Rest.MinimalApi IEndpointDefinition implementations
SessionEndpointDefinition # /api/sessions, /api/sessions/{id}, /api/sessions/{id}/agents, /api/sessions/{id}/messages,
# /api/sessions/{id}/messages/{uuid}/image/{blockIndex}, /api/sessions/{id}/tool-stats, /api/sessions/{id}/usage,
# /api/sessions/{id}/task-timeline
TaskEndpointDefinition # /api/tasks/all, PUT/DELETE/POST task operations
TeamEndpointDefinition # /api/teams/{name}
ProjectEndpointDefinition # /api/projects
PlanEndpointDefinition # /api/plans/{slug}, /api/plans/{slug}/open
SubagentEndpointDefinition # /api/sessions/{id}/subagents, /api/sessions/{id}/subagents/{agentId}/messages
SseEndpointDefinition # /api/events (SSE), /api/version, /api/cache/clear
UtilityEndpointDefinition # /api/open-folder, /api/open-in-editor
Contracts/
Models/ # ClaudeTask, SessionInfo, TeamConfig, SubagentInfo, MessageEntry, SessionTokenUsage,
# AnswerPayload/AnswerQuestion/AnswerOption (AskUserQuestion), MessageImage, etc.
Events/ # SseNotification, FileChangeEvent
Responses/ # ErrorResult, UpdateResult, ToolStatsResponse/ToolStat, UsageResponse/UsageRow, etc.
Parameters/ # [AsParameters] records (SessionIdParameters, UserImageParameters, etc.)
Helpers/
PathHelper # Path traversal prevention (shared by TaskService, PlanService)
TokenCostCalculator # Model-aware token cost calculation (Opus/Sonnet/Haiku pricing)
Extensions/ # ServiceCollectionExtensions, WebApplicationExtensions
Services/
SessionService # Session discovery from tasks/ + metadata from projects/, snapshots
TaskService # Task CRUD, dependency validation, notes, snapshots
TeamService # Team config reading with 5s cache TTL
PlanService # Plan markdown reading
SubagentService # Subagent JSONL transcript parsing from projects/
MessageService # JSONL tail-reading for session/subagent conversation messages
SessionActivityService # Activity status (thinking/waiting/idle/error) + token usage (incl. latest-turn context size) from JSONL
ToolStatsService # Per-session tool-call aggregation (success/failed/rejected, output-impact) from JSONL
TaskTimelineService # Per-task in-progress segments from TaskCreate/TaskUpdate results, incremental JSONL scan
UsageService # Per-participant token/cost breakdown (lead session + each subagent), composes SessionActivityService + SubagentService
ClaudeDirectoryWatcher # BackgroundService with 4 FileSystemWatchers (extension-filtered)
SseClientManager # SSE client connection manager (singleton)
UpdateCheck/
Models/ # NuGetVersionIndex, UpdateCheckCache (internal)
Services/ # UpdateCheckService (BackgroundService), logger messages
wwwroot/
index.html # Single-page Kanban + Timeline dashboard (embedded resource)
images/icon.png # ATC logo (favicon + sidebar)
GlobalUsings.cs # All using directives centralized here
test/Atc.Claude.Kanban.Tests/
Helpers/ # PathHelper, MockHttpMessageHandler
Services/ # SessionService, TaskService, TeamService, SubagentService,
# MessageService, SessionActivityService, PlanService,
# SseClientManager, UpdateCheckService, ToolStatsService, UsageService, TaskTimelineService tests
scripts/
seed-demo-fixture.ps1 # Materializes a synthetic ~/.claude tree for reproducible README screenshots (run with --dir)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday Changed · +7 lines · +915 tokens per session 512446f6e100
- 2d ago Changed · +1 lines · +129 tokens per session d878937f7112
- 12d ago Changed · +1 lines · +82 tokens per session ea72480be936
- 17d ago Changed · +9 lines · +1,085 tokens per session 014913cd864b
- 2mo ago First seen · 165 lines · 4,032 tokens per session scan A b5a6d6a12bc3
atc-claude-kanban CLAUDE.md is an instructions file published in the GitHub repository atc-net/atc-claude-kanban (12 stars, last pushed yesterday), licensed MIT. It adds 6,243 tokens to every session, about $0.0250 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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