# Estimate

> Estimates task effort by analyzing complexity, dependencies, historical velocity, and risk factors. Produces a structured estimate with confidence levels.

- **Type:** Skill
- **Install:** `agentstack add skill-frabcd-codex-ai-game-studio-estimate`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [frabcd](https://agentstack.voostack.com/s/frabcd)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [frabcd](https://github.com/frabcd)
- **Source:** https://github.com/frabcd/codex-ai-game-studio/tree/main/plugins/ai-game-studio/skills/estimate
- **Website:** https://frabcd.github.io/codex-ai-game-studio/

## Install

```sh
agentstack add skill-frabcd-codex-ai-game-studio-estimate
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

> Port provenance: adapted from the pinned upstream source at `984023ddac0d5e27624f2baacde6105e45de375f` under MIT; see the repository parity ledger for the exact path and blob.

## Phase 1: Understand the Task

Read the task description from the argument. If the description is too vague to estimate meaningfully, ask for clarification before proceeding.

Read AGENTS.md for project context: tech stack, coding standards, architectural patterns, and any estimation guidelines.

Read relevant design documents from `design/gdd/` if the task relates to a documented feature or system.

---

## Phase 2: Scan Affected Code

Identify files and modules that would need to change:

- Assess complexity (size, dependency count, cyclomatic complexity)
- Identify integration points with other systems
- Check for existing test coverage in the affected areas
- Read past sprint data from `production/sprints/` for similar completed tasks and historical velocity

---

## Phase 3: Analyze Complexity Factors

**Code Complexity:**
- Lines of code in affected files
- Number of dependencies and coupling level
- Whether this touches core/engine code vs leaf/feature code
- Whether existing patterns can be followed or new patterns are needed

**Scope:**
- Number of systems touched
- New code vs modification of existing code
- Amount of new test coverage required
- Data migration or configuration changes needed

**Risk:**
- New technology or unfamiliar libraries
- Unclear or ambiguous requirements
- Dependencies on unfinished work
- Cross-system integration complexity
- Performance sensitivity

---

## Phase 4: Generate the Estimate

```markdown
## Task Estimate: [Task Name]
Generated: [Date]

### Task Description
[Restate the task clearly in 1-2 sentences]

### Complexity Assessment

| Factor | Assessment | Notes |
|--------|-----------|-------|
| Systems affected | [List] | [Core, gameplay, UI, etc.] |
| Files likely modified | [Count] | [Key files listed below] |
| New code vs modification | [Ratio] | |
| Integration points | [Count] | [Which systems interact] |
| Test coverage needed | [Low / Medium / High] | |
| Existing patterns available | [Yes / Partial / No] | |

**Key files likely affected:**
- `[path/to/file1]` -- [what changes here]

### Effort Estimate

| Scenario | Days | Assumption |
|----------|------|------------|
| Optimistic | [X] | Everything goes right, no surprises |
| Expected | [Y] | Normal pace, minor issues, one round of review |
| Pessimistic | [Z] | Significant unknowns surface, blocked for a day |

**Recommended budget: [Y days]**

### Confidence: [High / Medium / Low]

[Explain which factors drive the confidence level for this specific task.]

### Risk Factors

| Risk | Likelihood | Impact | Mitigation |
|------|-----------|--------|------------|

### Dependencies

| Dependency | Status | Impact if Delayed |
|-----------|--------|-------------------|

### Suggested Breakdown

| # | Sub-task | Estimate | Notes |
|---|----------|----------|-------|
| 1 | [Research / spike] | [X days] | |
| 2 | [Core implementation] | [X days] | |
| 3 | [Testing and validation] | [X days] | |
| | **Total** | **[Y days]** | |

### Notes and Assumptions
- [Key assumption that affects the estimate]
- [Any caveats about scope boundaries]
```

Output the estimate with a brief summary: recommended budget, confidence level, and the single biggest risk factor.

This skill is read-only — no files are written. Verdict: **COMPLETE** — estimate generated.

---

## Phase 5: Next Steps

- If confidence is Low: recommend a time-boxed spike (`$ai-game-studio:prototype`) before committing.
- If the task is > 10 days: recommend breaking it into smaller stories via `$ai-game-studio:create-stories`.
- To schedule the task: run `$ai-game-studio:sprint-plan update` to add it to the next sprint.

### Guidelines

- Always give a range (optimistic / expected / pessimistic), never a single number
- The recommended budget should be the expected estimate, not the optimistic one
- Round to half-day increments — estimating in hours implies false precision for tasks longer than a day
- Do not pad estimates silently — call out risk explicitly so the team can decide

## Codex portability

Use the search, file-editing, shell, user-input, and subagent capabilities available in the active Codex surface. Use PowerShell syntax on Windows and POSIX syntax on macOS/Linux; do not require a Unix compatibility layer on Windows. Inherit the active model and permission mode, and do not weaken approval or sandbox boundaries.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [frabcd](https://github.com/frabcd)
- **Source:** [frabcd/codex-ai-game-studio](https://github.com/frabcd/codex-ai-game-studio)
- **License:** MIT
- **Homepage:** https://frabcd.github.io/codex-ai-game-studio/

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-frabcd-codex-ai-game-studio-estimate
- Seller: https://agentstack.voostack.com/s/frabcd
- Browse the marketplace: https://agentstack.voostack.com/browse

---
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