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igmarin/agnostic-planning-skills

A curated library of 12 language-agnostic planning skills and 4 personas for technical project management, product planning, and agile execution.

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SKILL.mdskills/task-management/estimate-tasks/

name:
estimate-tasks
type:
atomic
license:
MIT
description:
Assigns relative effort estimates using story points (Fibonacci) t-shirt sizes or time ranges — never mix frameworks within a single table, include confidence level per task, use table format with ID Task Estimate Confidence Notes, and flag high-uncertainty items. Language-agnostic. Use when the user asks to estimate effort, size tasks, or assign story points to backlog items. Trigger words: estimate, story points, t-shirt size, effort, sizing, fibonacci.
metadata:
{"version":"1.0.0","user-invocable":"true"}

Estimating Task Effort

Assign relative complexity estimates. Focus on comparison, not calendar time.

Quick Reference

  • Input: Task list (from generate-tasks) or PRD requirements.
  • Frameworks: Story points, t-shirt sizes, time ranges.
  • Output: Each task annotated with estimate + confidence.
  • Rule: Flag uncertainty - never fabricate precision.

HARD-GATE

DO NOT assign estimates you don't understand.
DO NOT default to "3 points" or "Medium" as a placeholder.
DO flag tasks needing further breakdown.
DO state confidence (high/medium/low) for every estimate.

Core Process

  1. Receive - task list or PRD requirements.
  2. Detect framework - ask user or infer from context (see Estimation Frameworks below).
  3. Analyze each task - scope, unknowns, whether it needs further breakdown.
  4. Assign - relative sizing, confidence level per task.
  5. Flag - low-confidence tasks (recommend spike), oversized tasks (recommend split).
  6. Output - annotated task list.

Estimation Frameworks

FrameworkScaleUse When
Story Points (Fibonacci)1 Trivial · 2 Small · 3 Medium · 5 Large · 8 Very Large · 13 Epic (→ split)Agile/Scrum teams focusing on relative complexity
T-Shirt SizesXS · S · M · L · XL (→ split)High-level roadmap sizing or stakeholder-facing discussions
Time Ranges<1d · 1-2d · 3-5d · 1-2wk · 2+wk (→ split)Fixed-bid projects requiring calendar anchors

Mixing frameworks: Never mix frameworks within a single estimation table. If the user switches frameworks mid-session, re-estimate the full table.

Output Style

  1. Framework - state which framework was used and why.
  2. Estimation table - | ID | Task | Estimate | Confidence | Notes |
  3. Flagged items - tasks needing spikes or splits, with reasoning.
  4. Summary - total estimate, confidence distribution, callouts.
  5. English only unless user requests otherwise.

Integration

SkillWhen to chain
generate-tasksEstimate tasks immediately after generation
identify-risksAfter estimation, assess dependency and uncertainty risks
plan-sprintSelect tickets based on capacity vs estimates

Reference: Worked Example

Supplementary reference only. Illustrates a complete estimation session, including a spike-blocked item.

Framework: Story points (Fibonacci) - inferred from backlog context.

IDTaskEstimateConfidenceNotes
T1Add user login via email/password3HighWell-understood auth pattern, existing library available
T2Build admin dashboard with role filtering8MediumUI scope is clear; role logic may expand
T3Integrate payment gatewayWARNING TBDLowAPI complexity unknown - spike required before estimating
T4Write unit tests for auth module2HighScope directly tied to T1, straightforward

Flagged items:

  • T3 - "Integrate payment gateway": Low confidence. Recommend a time-boxed spike (1-2 days) to evaluate API docs, sandbox availability, and edge-case handling before assigning points.

Summary: 3 estimated tasks total 13 points (High: 2, Medium: 1). T3 blocked pending spike. Re-estimate T3 after spike completes.

skills

task-management

estimate-tasks

SKILL.md

README.md

tile.json