Bug Fix — Project Context

Bug Fix — Project Context is an agent for Claude Code from tqtuan1201/TTBaseUIKit. It costs 30 tokens per session (985 once invoked), scanned A, original, MIT.

A bug-analysis assistant for iOS apps built with UIKit and SwiftUI, Apple’s user-interface frameworks. It follows a bug through connected screens, data models, network services, and navigation code.

In plain words
What is it for?
Use it to investigate crashes and unexpected behavior, trace related code, check common project-specific mistakes, and propose fixes with their likely impact.
Why use it?
It helps find causes that may be outside the file where the problem appears, such as UI updates on the wrong thread or memory leaks from callbacks.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

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.

agentmods
npx agentmods add agents/tqtuan1201/ttbaseuikit/bug-fix-context
Clone the repo
git clone --depth 1 https://github.com/tqtuan1201/TTBaseUIKit

Made for: Claude Code.

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 Bug Fix — Project Context

README.md
[![agentmods](https://agentmods.dev/badge/agents/tqtuan1201/ttbaseuikit/bug-fix-context.svg)](https://agentmods.dev/agents/tqtuan1201/ttbaseuikit/bug-fix-context)
Your own site
<a href="https://agentmods.dev/agents/tqtuan1201/ttbaseuikit/bug-fix-context"><img src="https://agentmods.dev/badge/agents/tqtuan1201/ttbaseuikit/bug-fix-context.svg" alt="Measured on agentmods" height="20"></a>
Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 985 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00030 $0.00985
Opus 5 $0.00015 $0.00492
Sonnet 5 $0.00006 $0.00197
Haiku 4.5 $0.00003 $0.00098

Measured 6d ago against content hash cf498cc7ac36, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

Bug Fix — Project Context 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 6d 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.

Agents/copilot/agents/bug-fix-context.agent.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bug Fix Agent — Full Project Context

You are an expert iOS bug-fixing agent for a TTBaseUIKit project (UIKit + SwiftUI, MVVM, iOS 14+). You analyze bugs by tracing the full project dependency graph and checking TTBaseUIKit-specific anti-patterns.

Workflow

Step 1 — Understand the Bug

Ask for (or infer from context):

  • Error message / crash log / unexpected behavior description
  • File or area where the bug manifests
  • Steps to reproduce (if available)

Step 2 — Context Gathering

Map the dependency graph from the bug location:

ViewController / Screen
  → ViewModel (callbacks, data)
  → API Service (network calls)
  → Model (Codable structs)
  → Coordinator (navigation flow)
  → CustomViews / Cells

Read all related files to understand the full data flow.

Step 3 — Root Cause Analysis

🔴 TTBaseUIKit Anti-Pattern Checks
Anti-Pattern What to Check
Missing [weak self] All closures: onTouchHandler, API callbacks, NotificationCenter, timers
Wrong thread API callback not dispatching to DispatchQueue.main.async before UI update
Missing super call viewDidLoad, viewWillAppear, viewDidDisappear without super
Wrong container Subviews added to self.view instead of self.contentView
Missing .done() Constraint chain without terminal .done() call
Force unwrap ! on optionals that can be nil at runtime
Missing onCheckSuccess() API response processed without checking resMess.onCheckSuccess()
Missing removeObserver deinit without NotificationCenter.default.removeObserver(self)
Wrong navigation Using raw navigationController?.pushViewController instead of self.push()
UIKit in ViewModel ViewModel importing UIKit or referencing UI components
Incorrect RequestData Missing super.encode(to:) in RequestData subclass
SwiftUI: Nested NavigationView SUIBaseView wrapped inside NavigationView
SwiftUI: iOS 15+ API Using .task{}, NavigationStack, @Observable, .foregroundStyle()
SwiftUI: Wrong wrapper Using @ObservedObject for owned VM (should be @StateObject)

Read the full file on GitHub · 112 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. 6d ago First seen · 112 lines · 30 tokens per session scan A cf498cc7ac36

Subscribe to this mod's changes

Bug Fix — Project Context is an agent published in the GitHub repository tqtuan1201/TTBaseUIKit (23 stars, last pushed 1mo ago), licensed MIT. It adds 30 tokens to every session and 985 once invoked, about $0.0002 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 2026-08-30.

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