# Kdenlive Foundation

> Use when porting kdenlive timeline document-model machinery — Fun undo-lambda composition on QUndoStack, typed move-validation with rollback, two-phase group moves on an upLink/downLink forest, functor clip insertion into playlists, refcounted snap grids with speed projection, snap-aware resize trials, group-scoped cuts with tree splits, same-track mix plant/replant ladders, speed unplant/swap/replant kernels, spacer ripples with temporary ungroup, selection-as-group-node with track locks, time-remap rebuilds, mix load recovery, zone extract/lift/insert/overwrite as single-undo ops, subtitle events on the group/snap/lock planes, paste id-remapping with post-insert rebuild, composition lifecycle with ordered field replant, guide-marker snap registries, fail-soft melt-load repair ladders, bin-load id-correspondence re-keying, self-proving consistency walks, marker-category migration folds, cut mix/fade interiors, cut-all fan-outs, group-tree partitions, group JSON codecs, paste lane elections.

- Skill: `ryan-brosas/kdenlive-foundation` (Agent Skill, multi-file: 38 files)
- Install (CLI): `npx skillmds@latest add ryan-brosas/kdenlive-foundation`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ryan-brosas/kdenlive-foundation/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: ryan-brosas (https://skillmd.com/u/ryan-brosas)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/ryan-brosas/kdenlive-foundation

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# kdenlive: timeline document-model foundation

## Foundation contract

This is a cold, source-specific foundation, not an operational procedure. It is
historical, revision-pinned evidence rather than timeless guidance. Current
project source, tests, requirements, and runtime behavior outrank this
projection and decide what ships.

## Provenance and revision

- Source record: `kdenlive`; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.
- Recorded revision: `master@62d6b0b79c51438705ca310b2178f422c1f31fe1`.
- Full provenance, coverage caveats, boundaries, and preserved evidence:
  `references/index.md`.

## Topic map

- Representative topics: Undo functor kernel; Move validation ladder; Group
  two-phase move; Track insertion ownership; Insertion functor ladder; Groups
  forest; Snap plane; Resize proposal.
- Scope and retrieval questions: `references/index.md#use-this-for`.
- Complete capsule chooser: `references/index.md#load-the-matching-source-dump`.
- Detailed grouped map: `references/index.md#capsule-map`.
- Source limitations and portability boundaries: `references/index.md#boundaries`.

## Retrieval

Open the index, choose one capsule matching the active question, and load only
that capsule. Revalidate its cited source and revision before relying on it. Do
not bulk-load the inventory, treat historical claims as current truth, or apply
this foundation as a procedure.