Estimate Issue Time in YouTrack

Sprint planning time estimator. Issue ID or empty for full current sprint: $ARGUMENTS

Step 1 — Determine Scope

Single-issue mode ($ARGUMENTS set):

Call mcp__youtrack__get_issue on $ARGUMENTS.
Proceed with that issue only.

Sprint mode ($ARGUMENTS empty):

Call mcp__youtrack__search_issues with query project: NCS Sprints: {current sprint} #Unresolved.
If query returns 0 results, use AskUserQuestion to ask for the sprint name, then retry with project: NCS Sprints: {name}.
Collect all returned issues.

Step 2 — Build Issue Tree

For each top-level issue from Step 1:

Fetch full details via mcp__youtrack__get_issue: summary, description, acceptance criteria, Type, existing Zeitschätzung, linked issues.
Identify subtasks from links with relation subtask of (i.e. issues where the fetched issue is the parent).
Recursively fetch subtasks until all leaves are known.
Group into tree: Epic → Story → Task/Subtask.

Leaf node = issue with no subtask children. Parent node = issue that has at least one subtask child.

Step 3 — Estimate Leaf Nodes

For each leaf node:

Read: summary, description, acceptance criteria, implementation notes.
If scope is unclear, search codebase (Grep/Bash) for related files to gauge complexity.
Assign estimate using this scale:

Size	Criteria	Estimate
Trivial	Config change, rename, 1-file tweak	30m
Small	1–3 files, clear scope, no unknowns	1h–2h
Medium	3–6 files, some design needed	3h–5h
Large	6+ files, cross-module, non-trivial design	1d–2d
XL	New subsystem, research spike, major refactor	3d–5d

Record: estimate + one-line reasoning.
Skip leaf if it already has Zeitschätzung set — note it as pre-estimated.

Step 4 — Roll Up for Display

YouTrack auto-sums Zeitschätzung from subtasks up to parents — do not write estimates to parent nodes.

Compute display-only rolled-up totals:

Parent total = sum of all descendant leaf estimates (including pre-estimated ones).
Flag any branch where some leaves are missing estimates (partial roll-up).

Step 5 — Show Summary + Confirm

Display full tree with estimates. Format:

Epic  NCS-10: Castling overhaul             [4h 30m]  ← rolled up
  Story NCS-11: Validate castling rights    [2h 30m]  ← rolled up
    Task  NCS-12: Fix RuleSet check          1h 30m   ← leaf (new)
    Task  NCS-13: Add regression tests       1h       ← leaf (new)
  Story NCS-14: UI feedback for castling    [2h]      ← rolled up
    Task  NCS-15: Highlight invalid squares  2h       ← leaf (pre-set, skipped)

Legend: [X] = display-only roll-up (not written). Plain = will be written to YouTrack.

If sprint mode, show grand total at bottom:

Sprint total: Xd Yh Zm  (N issues, M leaves to update)

Use AskUserQuestion tool:

Does the breakdown look right?
Any estimates to adjust before writing to YouTrack?

Incorporate all feedback before proceeding.

Step 6 — Write Estimates

On user approval, write estimates only to leaf nodes (bottom-up order):

For each leaf with a new estimate, call mcp__youtrack__update_issue with field Zeitschätzung = approved estimate.
YouTrack period format: "30m", "1h 30m", "1d", "2d 4h".
Skip leaves already pre-estimated.

Step 7 — Report

List all updated issues with set estimates. Show final rolled-up totals per Epic/Story (read back from YouTrack via mcp__youtrack__get_issue if needed). In sprint mode, show total sprint estimate.

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