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netresearch/typo3-upgrade-effort-model-skill · Archived

typo3-upgrade-effort-model

Use when estimating effort for TYPO3 LTS major version upgrades (current target: v14.3 LTS, released 2026-04-21).

First seen Apr 30, 2026

Installation

$ npx skills add netresearch/typo3-upgrade-effort-model-skill --skill typo3-upgrade-effort-model
View on skills.sh ↗ GitHub repository ↗

Summary

  • Use when estimating effort for TYPO3 LTS major version upgrades (current target: v14.3 LTS, released 2026-04-21).
  • Provides risk multipliers for v14 breaking changes (fact catalog owned by typo3-conformance's v14-deprecations.md), per-extension baselines, version-compatibility matrix, Rector coverage adjustments, 7-phase assessment workflow.
  • Calibration-free; pair with your historical data for tuned estimates.

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More details

Agent compatibility

Declared targets from SKILL.md / docs. Unmarked agents are not listed — the skill may still install via the CLI.

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Gemini CLI Not declared
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Repository health

Stars 1
License LICENSE-CC-BY-SA-4.0
Default branch main
Open issues 1
Status Archived

Skill metadata

Parsed from SKILL.md frontmatter.

Version1.4.1
More metadata
version
1.4.1

Package contents

Files included with this skill beyond the listing page.

  • skill md SKILL.md 4,412 B
  • docs SUMMARY.md 446 B

History

  1. First seen on skills.sh
  2. First recorded snapshot · 3 installs

SKILL.md

TYPO3 Upgrade Effort Model

Generic effort estimation model for TYPO3 LTS major version upgrades. Captures what makes an upgrade hard (per-version breaking-change deltas, Rector coverage, ecosystem readiness); your team's historical data captures how fast you handle each unit.

Calibration is intentionally external. The model gives per-extension hour ranges; you supply the multiplier from your own projects.

When to Use

  • TYPO3 upgrade estimation: "v13 → v14.3 LTS effort?"
  • Extension compatibility: "Which extensions need updates for v14?"
  • Skip-version vs incremental decisions

v14.3 LTS Headline

The largest breaking-change cycle in years — 98 breaking + 31 deprecation entries, all in v14.0. Sprint 14.0–14.2 are unsupported.

Most impactful v14 multipliers (full table in references/risk-multipliers.md):

Factor Multiplier
TypoScriptFrontendController removal (#107831) × 1.3
Fluid 5 strict VH typing (#108148) × 1.2
Core asset concat/compression removal (#108055) × 1.2
HashService removal, magic finders × 1.1 each
TCA sweep / EXT:form / ext_tables.php deprecation × 1.05–1.2

Rector: 47 v14 rules; discount × 0.80–0.85 vs hand-coded. Post-upgrade: +0.5–1 h for #109585 wizard if project transited through v14.2.

Baselines (before calibration)

Path Own ext (with Rector) Stale third-party Project ops
v13 → v14.3 4–8 h +2–4 h +0.5–1 h
v12 → v13.4 3–6 h +2–3 h +0.5 h
v11 → v12.4 4–7 h +3–5 h +1 h
v10 → v11.5 5–8 h +4–6 h +1 h

Multiply by team calibration factor (typically 0.6–1.4).

7-Phase Assessment Workflow

  1. Discovery — versions, extension inventory, build tooling
  2. Classification — see references/extension-classification.md
  3. Compatibility matrix — see references/version-compatibility.md
  4. Custom code analysis — grep triggers, see references/assessment-workflow.md
  5. Risk calculation — compound multipliers from references/risk-multipliers.md
  6. Work estimation — extensionhours = baseline × Π(multipliers) × rectordiscount × calibration
  7. Timeline — phased approach with validation gates

Companion Skills

  • typo3-conformance-skill — quality scoring (feeds risk multiplier)
  • typo3-testing-skill — coverage assessment
  • typo3-extension-upgrade-skill — performs the upgrade
  • typo3-project-upgrade-skill — deployed-project upgrade

For Netresearch-internal calibration with historical project data, see coding-ai/typo3-upgrade-estimator-skill (consumes this model).

References

  • references/risk-multipliers.md — full per-version table
  • references/version-compatibility.md — TYPO3 ↔ PHP matrix
  • references/extension-classification.md — categories and risk
  • references/assessment-workflow.md — command-level workflow
  • references/rector-coverage.md — Rector counts and discounts
  • references/flux-to-content-blocks-migration.md — Flux/VHS → Content Blocks + b13/container (cost block for Flux-based projects)
  • references/relaunch-vs-portation.md — relaunch vs. portation; estimate by work-package
  • references/upgrade-patterns.md — case study: georgringer/news v11→v12 upgrade patterns