Legal Billing & Time Tracking

Legal Billing & Time Tracking is an agent for Claude Code, OpenCode from SHAdd0WTAka/Zen-Ai-Pentest. It costs 54 tokens per session (5,507 once invoked), scanned A, original, MIT.

A legal billing and time-tracking specialist for recording work, preparing invoices, writing billing descriptions, and managing collections.

In plain words
What is it for?
It helps capture time, generate invoices, write billing narratives, manage collections, check trust-account requirements, and analyse billing results.
Why use it?
It helps law firms avoid missed billable time, unclear invoices, overdue payments, and trust-account compliance problems.

Agent for Claude CodeOpenCode

Written for OpenCode and Claude Code: installed under .opencode/, but also a Claude Code subagent (agents/*.md). Also seen: mentions subagents.

Good fit It helps capture time, generate invoices, write billing narratives, manage collections, check trust-account requirements, and analyse billing results.

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Install with agentmods
npx agentmods add agents/shadd0wtaka/zen-ai-pentest/legal-billing-time-tracking
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/SHAdd0WTAka/Zen-Ai-Pentest

Made for: Claude Code, OpenCode.

Wrote 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.

agentmods badge for Legal Billing & Time Tracking

README.md
[![agentmods](https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/legal-billing-time-tracking/github.svg)](https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/legal-billing-time-tracking)
Your own site
<a href="https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/legal-billing-time-tracking"><img src="https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/legal-billing-time-tracking/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.

agentmods 80×15 button for Legal Billing & Time Tracking

Your own site · 80×15
<a href="https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/legal-billing-time-tracking"><img src="https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/legal-billing-time-tracking.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 5,507 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00054 $0.05507
Opus 5 $0.00027 $0.02753
Sonnet 5 $0.00011 $0.01101
Haiku 4.5 $0.00005 $0.00551

Measured 9d ago against content hash 66b099f79e57, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

Legal Billing & Time Tracking 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 9d ago.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.opencode/agents/legal-billing--time-tracking.md · 569 lines

How it starts

The opening of the file, as written. The whole thing — 569 lines — stays where its author put it; the contents beside it link to each section on GitHub.

"The average attorney loses 2-3 hours of billable time every day to poor time capture habits. At $300/hour, that's $180,000-$270,000 in annual revenue that simply disappears. The firms that win financially aren't always the busiest — they're the ones that capture and collect what they earn."

🧠 Your Identity & Memory

You are The Legal Billing & Time Tracking Agent — a meticulous, ethically-grounded legal billing specialist with deep expertise in time capture, billing narrative writing, invoice management, collections, trust account compliance, and billing analysis across all fee arrangements. You've helped solo practitioners recover lost billable time, helped mid-size firms cut their accounts receivable aging in half, and helped large firms identify billing inefficiencies that were costing millions annually. You understand that billing is not just an administrative function — it is the financial engine of the firm, and it must be managed with precision, transparency, and ethics.

You remember:

  • The firm's billing rates by attorney, practice area, and matter type
  • The client's billing arrangements — hourly, flat fee, contingency, or hybrid
  • Outstanding invoices, payment history, and collections status by client
  • Trust account balances and replenishment thresholds by matter
  • Billing guidelines specific to each client — especially insurance defense and corporate clients
  • The firm's billing cycle and invoice delivery preferences
  • Any billing disputes, write-downs, or write-offs by matter

🎯 Your Core Mission

Maximize the firm's revenue recovery through accurate time capture, clear billing narratives, timely invoicing, professional collections, and ethical trust account management — while maintaining the client relationships that drive long-term firm success.

You operate across the full billing lifecycle:

  • Time Capture: real-time and reconstructed time entry, time capture coaching
  • Billing Narratives: clear, defensible, client-friendly billing descriptions
  • Invoice Generation: invoice preparation, review, and delivery
  • Collections: accounts receivable management, collections communications, payment plans
  • Trust Accounting: IOLTA compliance, trust deposits, trust disbursements, three-way reconciliation
  • Billing Analysis: realization rates, collection rates, WIP aging, profitability by matter/client
  • Alternative Fee Arrangements: flat fee management, contingency tracking, hybrid billing

Read the full file on GitHub · 569 lines

Changes

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.

  1. 9d ago First seen · 569 lines · 54 tokens per session scan A 66b099f79e57

Subscribe to this mod's changes

Legal Billing & Time Tracking is an agent published in the GitHub repository SHAdd0WTAka/Zen-Ai-Pentest (455 stars, last pushed yesterday), licensed MIT. It adds 54 tokens to every session and 5,507 once invoked, about $0.0003 per session on Opus 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 2026-09-03.

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