This file records notable catalog-contract and maintenance changes.

0.0.8 — Skill as the main entry (companion-repository half; see the website plan docs/product-and-growth-plan-0.0.8.md).

• FP-820: bare python verify.py is the learner's default command on every course and the data-analysis capstone — runs the suites, prints per-checkpoint status and earned claim codes (English first, Chinese after), exits non-zero while gated checkpoints are open. The four explicit usages remain maintainer checks; the published progress --json / --receipt-out formats are unchanged.
• FP-821: tools/verify_courses.py now copies each course folder plus the shared tools/claim_receipt.py into an isolated tree and runs the default command and the receipts contract there — a course fetched via the files endpoint verifies alone.

• FP-822: the six agent-tool courses' lesson 1 (EN+ZH) is rewritten around the fixed order get-the-tool-running → install the FlyPython Skill (network access included) → let the agent fetch the course files; every "download this folder" wording is gone from COURSE.md, COURSE_cn.md, and the lessons, and verify.py solution is no longer presented as a completion standard.
• FP-823: the prose checkpoints of agent-rules-single-source, mcp-server-in-python, and verifying-ai-generated-code are question lists the agent can ask directly at the human-in-the-loop gate; data-analysis courses keep their concrete checkpoint criteria and frontmatter hint questions.
• FP-824: both READMEs' "Start in three minutes" leads with the Skill entry sentence and the six agent-tool courses instead of a clone + download flow.

0.0.4 phase A — challenge-platform rework on top of 0.1.0.

• Per-checkpoint claim codes, badge frontmatter contracts, and the deterministic verify.py progress subcommand (FP-411/412/415), enforced by tools/verify_courses.py.
• The data-analysis course track: da-eda, da-visualization, and da-report (EN+ZH), each with pandas/matplotlib requirements.txt where needed and a stdlib-only report capstone.
• paths/ learning paths sequencing courses into badge routes, plus tools/verify_paths.py enforcing the path contract (FP-413/416/417/418, wired into the Makefile and the validation workflow).
• content-manifest.json path entries (type: "path") for the website.
• Checkpoint hints, the branch-path contract, and agent-solvability review records across all eight courses (2026-09-13).

• Repository narrative moved from agent-taught courses to challenge courses with TASK.md contracts and verify.py claim codes; COURSE.md remains the guided mode. README, README_cn, and llms.txt now reflect it.

First versioned release: agent-taught courses, the Project Radar system, and the 0.0.3 contract updates.

• A courses/ content type: agent-taught folders with COURSE.md teaching contracts, bilingual lesson pairs, scenario skins, task contracts, runnable starter/solution pairs, and objective verify.py completion evidence.
• The five-course 0.0.3 batch: "Hands-on Python with Claude Code" (flagship), "Hands-on with OpenAI Codex CLI" (reuses the C1 core), "One source of truth for agent rules" (rule-drift checker core), "From 'it runs' to 'it ships'" (release-evidence builder core), and "Give your agent tools with MCP" (reuses the reviewed mcp-server contract) — each EN+ZH with scenario skins and REVIEW.md run-through records.
• tools/verify_courses.py enforcing the course folder contract, wired into the Makefile and the validation workflow.
• Project Radar per-project YAML records (catalog/projects/*.yml) with lifecycle status, maintenance evidence, and ai_familiarity grading.
• Deterministic radar.json export with schema/radar-v1.schema.json and --check support in tools/export_catalog.py (--target both).
• Bilingual generated Radar tables in catalog/projects/README.md and README_cn.md.
• tools/radar_scan.py: read-only, rate-limited discovery of Radar review candidates from GitHub Search, the PyPI feed, and Hacker News — candidates only, never descriptions or status.
• A course-feedback issue template for teaching drift and verify mismatches.
• content-manifest.json and its schema now carry course documents.
• Courses and Radar sections in llms.txt.

• README/README_cn gained a course banner, a courses row, and contextual flypython.com footers on every guide, playbook, and example (first-party continuation links per docs/REPO_TO_WEBSITE.md).
• The validation workflow now verifies the radar export and every course folder in addition to the existing gates.
• Bilingual guide-URL tests now allow first-party flypython.com footer links alongside reviewed catalog URLs.

• A complete bilingual Python AI-coding workflow covering task contracts, repository inspection, reproducible environments, bounded changes, tests, runtime verification, side-effect review, and evidence-based delivery.
• Browsable English and Chinese README indexes containing every reviewed resource, its rationale, level, access requirements, risk, and review date.
• Deterministic README generation and drift checks backed by canonical catalog data.
• One source file per reviewed resource under catalog/resources/.
• A deterministic, versioned catalog.json export for pinned website consumers.
• A JSON Schema describing the public catalog v1 contract.
• A pinned-revision and checksum contract for website consumers.
• Export drift checks in tests and pull-request validation.
• Positive, unique, consecutive ordering within each learning path.
• Catalog validation and a safe external-link auditor with retry, report, and SSRF/DNS-rebinding protection.
• Contribution, conduct, security, issue, and resource-curation policies.
• A product-quality guide and five bilingual task playbooks for bug fixes, API work, external integrations, dependency upgrades, and releases.
• A standard-library-only example with a deliberately failing starter, verified solution, and task contract.
• Reusable task, plan, review, verification, agent-instruction, and pyproject templates.
• A versioned content-manifest.json with bilingual paths, summaries, review state, and source checksums for pinned website consumers.
• A human-review contribution queue for current Python Project Radar entries.

• Defined this repository as the canonical Python product-engineering content, catalog-data, and review layer behind flypython.com, rather than a second public website.
• Split catalog metadata, paths, and resources into independently reviewable files while preserving the 21 existing human-reviewed resource records.
• Required website consumers to pin a full repository commit and verify the exported catalog checksum instead of following a moving branch.
• Reduced the required local toolchain to Python 3.12 and locked Python dependencies.

• Removed Jekyll, Ruby, page templates, styles, scripts, social assets, CNAME, robots configuration, and site-rendering tests.