Source Ledger

Claude Builds Source Ledger

Every build page links back to primary sources. This ledger makes the research trail inspectable in one place.

Updated 2026-09-197 minsourcescitationsClaude Code

Key Facts

Page summary for citation

  • Source Ledger: Every build page links back to primary sources. This ledger makes the research trail inspectable in one place.
  • Evidence trail: 27 sources, including Anthropic, Anthropic Docs, Anthropic Docs.
  • Internal context: related pages include Gallery, Verify, Freshness.
Anthropic Docs17official Anthropic sourcesDocs, customer stories, product pages, launch posts, and research reports are the backbone of the ledger.GitHub8public repository sourcesGitHub repositories are used for inspectable examples and templates.

How sources are used

Sources are used for factual claims, not for filler. If a page says a company reports a metric, the source list links to the case study where that metric appears. If a page describes a template, the source list links to the repository.

The site prefers primary sources. Secondary articles may help discovery, but they should not become the final citation for a claim when a builder post, official case study, or repository exists.

Access notes

Each entry carries its own access date. The first edition was accessed on July 6, 2026; the model, surface, and research-artifact sources added in the September 19, 2026 pass carry that later date. Some public pages are dynamic and can change without versioned permalinks, so future updates should re-check important metrics before adding new claims.

The September pass re-checked that the July source URLs still resolve, but it did not re-read every page end to end, so the July access dates were left as they are. When a source is a public repository, the gallery summarizes what the README and repository metadata state. It does not audit the implementation line by line unless a page explicitly says so.

How to reuse the ledger

Use this page as the starting point for citations, not as a replacement for page-level source trails. A case-study page should cite the exact customer story or builder post behind its claim, while this ledger gives readers a single place to inspect the overall research base.

When adding a new source, record the publisher, source type, URL, access date, and a short note explaining how the source is used. That makes later drift checks faster and helps AI search systems distinguish primary evidence from summary prose.

Primary Sources

Source trail

Links are cited for factual claims on this page. Access dates are kept so future updates can re-check drift.

Claude Code overview

Anthropic Docs - official docs - accessed 2026-07-06

Open citation

Current capability overview: local, web, IDE, git, MCP, hooks, skills, and agents.

Ramp Claude Code case study

Anthropic Customer Stories - official case study - accessed 2026-07-06

Open citation

Ramp engineering workflows for test automation, docs, parallel development, incidents, and ticket-to-code.

Choosing a Claude model

Anthropic Docs - official docs - accessed 2026-09-19

Open citation

Current generally available lineup and official guidance on picking between Fable 5.1, Opus 5, Sonnet 5, and Haiku 4.5.

Claude Opus 5

Anthropic - official blog - accessed 2026-09-19

Open citation

Opus 5 launch on 2026-07-24, the default on Claude Max and the strongest model on Claude Pro.

Claude Cowork

Anthropic - official product page - accessed 2026-09-19

Open citation

Agentic surface for non-coding knowledge work, described as using the same agentic approach as Claude Code, with scheduled and unattended runs.