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Claude Code Ultimate Guide v3.45.2
Guide 3.45.2 answers a question that keeps coming back: one agent, subagents, or an agent team?
- Single agent, subagents or a team: the October 2026 evidence. A new section weighs three sources, each with its limit: Anthropic's article on folding subagents into the main loop (field report, no published scores), the official cost and intelligence page (Haiku 5.5 subagents were "an alternative to lowering effort, not better"), and arXiv 2610.10263 (dynamic concurrency hurt bounded tasks and helped long ones). Default: one loop with skills, split only for a named reason.
- Plans and credits in the main guide. Free, Pro, Max and Ultra (formerly Max 20x), the 5-hour limit removal for verified Ultra accounts, and the monthly API credits active since October 7, 2026 for Max, Ultra and Team.
- Product changes outside the CLI changelog for September and October 2026: Code Review GA, cloud sessions GA, Cowork cloud tasks, Sonnet 4.5 retirement on November 30, Messages API compaction beta and more, each linked to the official page.
- French full guide current again with all English changes since its 3.44.1 source.
- Agent Teams sizing in the quick start,
CLAUDE_CODE_SUBAGENT_MODEL_FORCEin the settings reference, and release tooling fixes.
The research started from a Perplexity run; every claim kept here was re-read at its source, and figures that could not be verified were left out.
Validation: validate-reference-yaml.py --ci reports 0 hard failures, the reference resync check passes, the French translation check passes with --require-current-maintained, and the public-path check reports 0 offending lines.
Full details: CHANGELOG
Claude Code Ultimate Guide: EN/FR PDF & EPUB v3.45.2
English and French full guides, generated from the maintained Markdown sources.
The build requires the French translation to match its recorded English source.
| Format | Download |
|---|---|
| PDF EN | guide-export.pdf |
| EPUB EN | guide-export.epub |
| PDF FR | guide-export-fr.pdf |
| EPUB FR | guide-export-fr.epub |
Built with Quarto + Typst through scripts/render-publications.py.
Claude Code Ultimate Guide v3.45.1
Guide 3.45.1 is a patch release.
- Agent Router is public. The guide entry now links FlorianBruniaux/agent-router, public since October 28, 2026 as an experimental source candidate (tag
v0.0.1, no packaged release). The license is corrected to Apache-2.0 and the install command follows the public README. The README establishes no general cost or quality gain yet. - Links to sibling projects: the guide links the Cowork Guide and other sibling sites.
Validation: validate-reference-yaml.py --ci reports 0 hard failures and the public-path check reports 0 offending lines.
Full details: CHANGELOG
Claude Code Ultimate Guide v3.45.0
Guide 3.45.0 collects the work since 3.44.1 (October 6, 2026).
- Claude Code releases tracked through 2.1.316. The release history adds the October 7 to 31 releases. Highlights:
permissions.blockWritesOutsideWorkingDirectories(2.1.314),CLAUDE_CODE_SUBAGENT_EFFORT(2.1.316),ultrathinkat xhigh effort on current models (2.1.311), and theclaude_code.safety_eventOpenTelemetry event no longer sent (2.1.312). Fast mode for Opus 4.8 is deprecated, with removal scheduled for November 30, 2026. - Claude plans. Max 20x is now Ultra ($200 a month, 10x Pro usage every week, no 5-hour limit once the account is verified) and Max 5x is now Max ($100). The guide records the monthly API credits included with Max, Ultra and Team plans since October 7, 2026.
- New AI Design Patterns page: 21 classic patterns mapped to the closest Claude Code mechanism, with where each analogy breaks, 8 agent-native patterns, 10 anti-patterns and one infographic per pattern.
- Guide additions: sizing configuration ablations in agent evaluation, several coding-agent sessions on one machine, a worked local inference example, and the "grill me" interview before a spec.
- Ecosystem: prismantis and a "Terminal rendering (mods)" category, agent-native Git forges,
git-ai-archaeologyv2, and the MCP package 1.3.7 on npm and the official MCP Registry.
Validation: validate-reference-yaml.py --ci reports 0 hard failures, index coverage is 110/110, the public-path check reports 0 offending lines, and the 44 MCP package tests pass.
Known limit: the subscription section of guide/ultimate-guide.md still describes the September plan lineup; the up-to-date plan details are in the LLM market snapshot. The French full guide stays on its 3.44.1 refresh.
Full details: CHANGELOG · Release history
Claude Code Ultimate Guide v3.44.1
The English and French publication editions are now aligned with guide 3.44.1.
- Refreshed both full guides, all 13 e-book titles in EN/FR, 58 recap cards in EN/FR, and the two daily cheatsheets.
- Updated model references, hook inputs, billing boundaries, FinOps and verification controls. Productivity and security study results retain their dates, samples and evidence limits.
- Rebuilt the PDF and EPUB downloads from committed sources. Fixed duplicated page numbers, orphaned callout headings and formatting in embedded French recap sheets.
- Updated website download links, page counts, the six recap-card archives and stable email download aliases. Previous versioned downloads remain available.
Validation: all 174 catalog exports pass integrity and source-freshness checks; the six ZIP archives are complete; the 44 MCP tests pass. All 116 standalone cards were inspected on contact sheets, with full-page checks of dense examples. Books received a targeted visual review, rather than a full revalidation of every historical claim or code example.
The attached full guides are the reviewed 3.44.1 exports. publications.json records source provenance and the hashes of the complete catalog. The npm MCP package remains 1.3.6.
Claude Code Ultimate Guide v3.44.0
Claude Code Ultimate Guide v3.44.0 collects the guide updates since v3.43.0, with new Lean workflow controls, AI FinOps references, expanded agent harness guidance and the published MCP 1.3.6 fixes.
Highlights
- Lean and AI workflows: review-capacity admission, testable legacy slices, repository readiness and countermeasure worksheets. The guide distinguishes delivery activity from measured user outcomes.
- AI FinOps: subscription quotas, metered API tokens and owned inference capacity; ten cost levers and a source-checked market snapshot dated September 30, 2026.
- Token-saving benchmarks: revised end-to-end comparisons, vendor-versus-independent evidence, removed unsupported savings claims and the author's RTK contributor disclosure.
- Agent harnesses and engineering methods: durable execution, acceptance and recovery contracts, brownfield workflows, skill packs and Codex hook failure modes.
- Security references: AgentSec threat database 2.31.0, updated advisory and migration guidance, and a DarkMoon/Strix pentesting comparison with explicit evidence limits.
- MCP 1.3.6: published npm and official Registry package with repaired chapter links and source offsets, corrected index references, translation metadata and public statistics collection. The MCP package follows its own version sequence.
- Documentation and publication: Claude Code release tracking through v2.1.289, machine-readable discovery, bilingual export tooling, and version synchronization that preserves numbered sections and historical references.
Reading and downloads
The French full guide remains at its recorded v3.43.0 source revision and is declared stale against the current English guide. This release publishes the current sources. Its four attached books are unchanged copies of the published v3.43.0 PDF and EPUB editions, with their original edition identified in each asset label. Their SHA-256 hashes match the original release. Keeping the existing filenames preserves the Latest download links.
Claude Code Ultimate Guide: EN/FR PDF & EPUB v3.44.1
English and French full guides, generated from the maintained Markdown sources.
The build requires the French translation to match its recorded English source.
| Format | Download |
|---|---|
| PDF EN | guide-export.pdf |
| EPUB EN | guide-export.epub |
| PDF FR | guide-export-fr.pdf |
| EPUB FR | guide-export-fr.epub |
Built with Quarto + Typst through scripts/render-publications.py.
Claude Code Ultimate Guide: EN/FR PDF & EPUB v3.43.0
English and French full guides, generated from the maintained Markdown sources.
The build requires the French translation to match its recorded English source.
| Format | Download |
|---|---|
| PDF EN | guide-export.pdf |
| EPUB EN | guide-export.epub |
| PDF FR | guide-export-fr.pdf |
| EPUB FR | guide-export-fr.epub |
Built with Quarto + Typst through scripts/render-publications.py.
Claude Code Ultimate Guide v3.43.0
Claude Code Ultimate Guide v3.43.0
This release replaces the 1,003-line repository README with a 391-line source-oriented entry point and introduces a shared intent navigation contract for the repository and public sitemap.
Highlights:
- Shared Start, Build, Scale, Resources, and Updates navigation generated from
machine-readable/navigation.json - Public sitemap synchronized from the same versioned contract
- MCP server 1.3.1 published to npm and the official MCP Registry with 17 tools, 6 resources, one prompt, generated product documentation, and protected publication gates
- Loop and graph engineering, subscription strategy, translation governance, and current security and reliability research accumulated since v3.42.0
MCP package: claude-code-ultimate-guide-mcp
MCP Registry identity: io.github.FlorianBruniaux/claude-code-guide
Full details: CHANGELOG.md
Claude Code Ultimate Guide — PDF & EPUB Export v3.41.1
Full guide (guide/ultimate-guide.md) as PDF and EPUB, built with Quarto + Typst (Bold Guy template). English. French assets (guide-export-fr.*) added once retranslated.