{
  "schema_version": 1,
  "checked_on": "2026-10-19",
  "checked_samples_revision": "49e350adb4f2c4495c0601cb14e23a9260e304a1",
  "manifest_sha256": "e3a5f08cec45aff6b937ca9cbfcf31c3855ed1192e39181242c9cdcd35723782",
  "scope": "Five selected patterns. Project activity and indexed verification are separate. Unindexed capabilities remain unassessed here.",
  "briefing_sha256": "4e4995f34d42b6ea5ae4a9d269b0cc04e39d15c75fe75a3c5696f9a34803037b",
  "briefing": [
    {
      "id": "code",
      "name": "Code Like It's 198x",
      "purpose": "Help people understand programming by making games on machines they can understand.",
      "headline": "Selected first programs build, change and reopen.",
      "assessment": "The four core routes are authored. Selected first-program workflows now have evidence for editing, rebuilding and reopening on macOS; the rest of the curriculum still needs content and learner acceptance.",
      "demonstrated": "Spectrum editing and recovery, C64 red/green PRG execution, Amiga red/green bootable disks and the NES edited-cartridge handoff have retained observations. The C64 starter and Amiga instructions were corrected during these checks.",
      "gap": "Uncoached understanding remains unobserved. Screen-reader use, touch, wider lesson review and deferred Windows/Linux manual walkthroughs remain open. One successful program does not establish a complete course.",
      "checkpoint": "Review the next NES lesson, “LDA Is Not LET”, against its running program: register explanation, predicted result and fault/repair task.",
      "checkpoint_reason": "This checks the transition from changing a colour to explaining how the machine stores and transfers a value.",
      "reviewed_on": "2026-10-19",
      "sources": [
        {
          "label": "Purpose and curriculum direction",
          "url": "https://github.com/code198x/docs/blob/63632e65a57449f8393355901a96ff3644771640/PROJECT.md",
          "sha256": "43ee873195c4eba435cf07ebef8a0fa736818a7aa9234ee5be36cbdc39d30bd7",
          "current_sha256": "43ee873195c4eba435cf07ebef8a0fa736818a7aa9234ee5be36cbdc39d30bd7",
          "matches": true
        },
        {
          "label": "Current curriculum work boundaries",
          "url": "https://github.com/code198x/docs/blob/63632e65a57449f8393355901a96ff3644771640/AGENTS.md",
          "sha256": "53f7fa5421fa3736439b33e978260cd24878f310b52fe2a8a60474b13a66fe2d",
          "current_sha256": "53f7fa5421fa3736439b33e978260cd24878f310b52fe2a8a60474b13a66fe2d",
          "matches": true
        },
        {
          "label": "Release and learner acceptance",
          "url": "https://github.com/code198x/docs/blob/63632e65a57449f8393355901a96ff3644771640/launch-readiness.md",
          "sha256": "897ce4832f66eac22506f052c76cb287fa63e3f9164e99ae13fc8a1c63cc5abd",
          "current_sha256": "897ce4832f66eac22506f052c76cb287fa63e3f9164e99ae13fc8a1c63cc5abd",
          "matches": true
        },
        {
          "label": "Spectrum BASIC catalogue",
          "url": "https://github.com/code198x/website/blob/f70f0d82a8463f4af7e444526b074e91ee3163c8/src/content/modules/sinclair-zx-spectrum/basic.yaml",
          "sha256": "3127c8813f3ede293f559b9303fdd61c4827822e4fe70b483b3bd443d0afc20f",
          "current_sha256": "3127c8813f3ede293f559b9303fdd61c4827822e4fe70b483b3bd443d0afc20f",
          "matches": true
        },
        {
          "label": "C64 assembly catalogue",
          "url": "https://github.com/code198x/website/blob/f70f0d82a8463f4af7e444526b074e91ee3163c8/src/content/modules/commodore-64/assembly.yaml",
          "sha256": "c0b16d54e702a29ef92451be55268d8da261385648ca8e2b66a6ba0b856cd35b",
          "current_sha256": "c0b16d54e702a29ef92451be55268d8da261385648ca8e2b66a6ba0b856cd35b",
          "matches": true
        },
        {
          "label": "Amiga assembly catalogue",
          "url": "https://github.com/code198x/website/blob/f70f0d82a8463f4af7e444526b074e91ee3163c8/src/content/modules/commodore-amiga/assembly.yaml",
          "sha256": "95fb6731a551de94887be777d1794a15f4ea7d5afef2ef2df27bd6509fd308fe",
          "current_sha256": "95fb6731a551de94887be777d1794a15f4ea7d5afef2ef2df27bd6509fd308fe",
          "matches": true
        },
        {
          "label": "NES assembly catalogue",
          "url": "https://github.com/code198x/website/blob/f70f0d82a8463f4af7e444526b074e91ee3163c8/src/content/modules/nintendo-entertainment-system/assembly.yaml",
          "sha256": "4615c873440f2b9013d261ae5418f5b10a27cefbe565dc8f36cc6c9855195c85",
          "current_sha256": "4615c873440f2b9013d261ae5418f5b10a27cefbe565dc8f36cc6c9855195c85",
          "matches": true
        },
        {
          "label": "Reviewed first-session workflows, corrections and remaining gaps",
          "url": "https://github.com/code198x/website/blob/aa866b0096d87ecacbc5a5eeaa2d6e075c28b80a/docs/reviews/2026-10-19-first-session/README.md",
          "sha256": "76135d615c17eeb68b03690c1c974db417e2e276b2b1fecccfeb887666a5f641",
          "current_sha256": "76135d615c17eeb68b03690c1c974db417e2e276b2b1fecccfeb887666a5f641",
          "matches": true
        },
        {
          "label": "Retained NES browser/download/native handoff observations",
          "url": "https://github.com/code198x/website/blob/aa866b0096d87ecacbc5a5eeaa2d6e075c28b80a/docs/reviews/2026-10-19-first-session/nes.json",
          "sha256": "07f18d1789d9c32a9cec5338ff5b5a73c2cd8cb395954922154bd3ac8a4c310f",
          "current_sha256": "07f18d1789d9c32a9cec5338ff5b5a73c2cd8cb395954922154bd3ac8a4c310f",
          "matches": true
        }
      ],
      "assessment_state": "current",
      "assessment_label": "Source records unchanged"
    },
    {
      "id": "emu",
      "name": "Emu198x",
      "purpose": "Run historical machines accurately enough to inspect, explain and create with them.",
      "headline": "Named workflows run; broader usability remains open.",
      "assessment": "Selected browser and native paths execute the first programs. Results belong to their named model, release and host; native candidate acceptance and released-binary execution remain separate.",
      "demonstrated": "Released Emu198x 0.38.1 boots the selected A500 disks and runs the downloaded NTSC NES cartridge. The Spectrum macOS keyboard, listening and recovery checklists received user-reported acceptance; C64 browser PRG execution also passed.",
      "gap": "Other models and complete native input, sound and file workflows still need their own evidence. Windows/Linux manual checks are deferred. Hosted Spectrum evidence retention remains blocked; local success does not remove that blocker.",
      "checkpoint": "Exercise truncated-cartridge rejection followed by valid-cartridge recovery in the published NTSC NES binary, recording state and exit observations.",
      "checkpoint_reason": "This extends the demonstrated reopening path into a recoverable failure without treating a core check as proof of native dialogs or other hosts.",
      "reviewed_on": "2026-10-19",
      "sources": [
        {
          "label": "Shipping systems and evidence ownership",
          "url": "https://github.com/emu198x/emu198x/blob/44e0015a81ac088a5fb425f77c6abaf572f4d9c5/docs/status/current-system-usability.md",
          "sha256": "23778379ed291b62188331abf7def4f9f31fa7914481ff7c748a5864b7f642f2",
          "current_sha256": "23778379ed291b62188331abf7def4f9f31fa7914481ff7c748a5864b7f642f2",
          "matches": true
        },
        {
          "label": "Native UI scope and host gaps",
          "url": "https://github.com/emu198x/emu198x/blob/44e0015a81ac088a5fb425f77c6abaf572f4d9c5/docs/status/native-ui-catalogue-audit.md",
          "sha256": "c4a26302e052cc2562f51e17031ff48f296b6770fcae5bf0c4dd49f5f5fb23ce",
          "current_sha256": "c4a26302e052cc2562f51e17031ff48f296b6770fcae5bf0c4dd49f5f5fb23ce",
          "matches": true
        },
        {
          "label": "Owning system work queues",
          "url": "https://github.com/emu198x/emu198x/blob/44e0015a81ac088a5fb425f77c6abaf572f4d9c5/docs/status/outstanding-work.md",
          "sha256": "35063c57e9916a3329d86013bee8f2b5b12936f86fa1f26b1d0a55bc092b1258",
          "current_sha256": "35063c57e9916a3329d86013bee8f2b5b12936f86fa1f26b1d0a55bc092b1258",
          "matches": true
        },
        {
          "label": "Native installation, execution and source-debug observations",
          "url": "https://github.com/emu198x/emu198x/blob/44e0015a81ac088a5fb425f77c6abaf572f4d9c5/docs/status/native-installation-evidence.md",
          "sha256": "1738e47e42f58e45383d4d2c7b9bdc234f82fdab49a2f486517d80fa92f09be7",
          "current_sha256": "1738e47e42f58e45383d4d2c7b9bdc234f82fdab49a2f486517d80fa92f09be7",
          "matches": true
        },
        {
          "label": "Reviewed first-session workflows, corrections and remaining gaps",
          "url": "https://github.com/code198x/website/blob/aa866b0096d87ecacbc5a5eeaa2d6e075c28b80a/docs/reviews/2026-10-19-first-session/README.md",
          "sha256": "76135d615c17eeb68b03690c1c974db417e2e276b2b1fecccfeb887666a5f641",
          "current_sha256": "76135d615c17eeb68b03690c1c974db417e2e276b2b1fecccfeb887666a5f641",
          "matches": true
        },
        {
          "label": "Retained NES browser/download/native handoff observations",
          "url": "https://github.com/code198x/website/blob/aa866b0096d87ecacbc5a5eeaa2d6e075c28b80a/docs/reviews/2026-10-19-first-session/nes.json",
          "sha256": "07f18d1789d9c32a9cec5338ff5b5a73c2cd8cb395954922154bd3ac8a4c310f",
          "current_sha256": "07f18d1789d9c32a9cec5338ff5b5a73c2cd8cb395954922154bd3ac8a4c310f",
          "matches": true
        }
      ],
      "assessment_state": "current",
      "assessment_label": "Source records unchanged"
    },
    {
      "id": "asm",
      "name": "Asm198x",
      "purpose": "Give retro programs a maintainable toolchain that respects existing source dialects.",
      "headline": "First-program builds agree with reference assemblers.",
      "assessment": "Released Asm198x 0.0.71 builds the selected C64, Amiga and NES first programs with independent reference-byte agreement. This is useful authoring evidence for those sources, not a blanket dialect-compatibility promise.",
      "demonstrated": "ACME, native vasm and ca65/ld65 agree with the selected first-program outputs. The browser’s downloaded NES source rebuilds into identical cartridge bytes, and only the intended colour byte changes between its red and blue variants.",
      "gap": "The joined examples cover a small part of the CPU and dialect surface. Legacy reference tests can skip when external tools or sources are absent; a green general suite alone does not establish those comparisons ran.",
      "checkpoint": "Compare the next NES lesson with ca65/ld65, checking its segment placement and a deliberate invalid operand as well as successful output.",
      "checkpoint_reason": "This follows a concrete teaching program beyond the already demonstrated starter and keeps successful comparisons separate from skipped prerequisites.",
      "reviewed_on": "2026-10-19",
      "sources": [
        {
          "label": "Toolchain front doors and validation scope",
          "url": "https://github.com/asm198x/asm198x/blob/2a1ef3f163ff7fb9fbd6959bf7be3881114bc095/README.md",
          "sha256": "59b45e7b74c4d897a5d50b8f440fd9bcf846264ab71d4647fb2f2f6b864ef1d7",
          "current_sha256": "59b45e7b74c4d897a5d50b8f440fd9bcf846264ab71d4647fb2f2f6b864ef1d7",
          "matches": true
        },
        {
          "label": "Reference-test prerequisites and skip behaviour",
          "url": "https://github.com/asm198x/asm198x/blob/2a1ef3f163ff7fb9fbd6959bf7be3881114bc095/crates/asm198x/tests/curriculum.rs",
          "sha256": "49bb73374f446f8e0976fb98f39a648fffc991b713628ae71fb12540ebe1b27c",
          "current_sha256": "49bb73374f446f8e0976fb98f39a648fffc991b713628ae71fb12540ebe1b27c",
          "matches": true
        },
        {
          "label": "Native installation, execution and source-debug observations",
          "url": "https://github.com/emu198x/emu198x/blob/44e0015a81ac088a5fb425f77c6abaf572f4d9c5/docs/status/native-installation-evidence.md",
          "sha256": "1738e47e42f58e45383d4d2c7b9bdc234f82fdab49a2f486517d80fa92f09be7",
          "current_sha256": "1738e47e42f58e45383d4d2c7b9bdc234f82fdab49a2f486517d80fa92f09be7",
          "matches": true
        },
        {
          "label": "Reviewed first-session workflows, corrections and remaining gaps",
          "url": "https://github.com/code198x/website/blob/aa866b0096d87ecacbc5a5eeaa2d6e075c28b80a/docs/reviews/2026-10-19-first-session/README.md",
          "sha256": "76135d615c17eeb68b03690c1c974db417e2e276b2b1fecccfeb887666a5f641",
          "current_sha256": "76135d615c17eeb68b03690c1c974db417e2e276b2b1fecccfeb887666a5f641",
          "matches": true
        },
        {
          "label": "Retained NES browser/download/native handoff observations",
          "url": "https://github.com/code198x/website/blob/aa866b0096d87ecacbc5a5eeaa2d6e075c28b80a/docs/reviews/2026-10-19-first-session/nes.json",
          "sha256": "07f18d1789d9c32a9cec5338ff5b5a73c2cd8cb395954922154bd3ac8a4c310f",
          "current_sha256": "07f18d1789d9c32a9cec5338ff5b5a73c2cd8cb395954922154bd3ac8a4c310f",
          "matches": true
        }
      ],
      "assessment_state": "current",
      "assessment_label": "Source records unchanged"
    }
  ],
  "projects": [
    {
      "id": "code",
      "name": "Code Like It's 198x",
      "role": "Learn retro development through curriculum and working examples.",
      "phase": "active",
      "url": "https://github.com/code198x/code-samples",
      "capabilities": [
        "spectrum",
        "c64",
        "nes",
        "amiga",
        "aabb"
      ],
      "verified_count": 5
    },
    {
      "id": "emu",
      "name": "Emu198x",
      "role": "Run historical machines and observe their behaviour.",
      "phase": "active",
      "url": "https://github.com/emu198x/emu198x",
      "capabilities": [
        "spectrum",
        "c64",
        "nes",
        "amiga"
      ],
      "verified_count": 4
    },
    {
      "id": "asm",
      "name": "Asm198x",
      "role": "Assemble and disassemble programs for period processors.",
      "phase": "active",
      "url": "https://github.com/asm198x/asm198x",
      "capabilities": [
        "spectrum",
        "c64",
        "nes",
        "amiga"
      ],
      "verified_count": 4
    },
    {
      "id": "build",
      "name": "Build198x",
      "role": "Convert assets and master native media.",
      "phase": "active",
      "url": "https://github.com/build198x/build198x",
      "capabilities": [
        "amiga"
      ],
      "verified_count": 1
    },
    {
      "id": "isa",
      "name": "Isa198x",
      "role": "Describe instruction encodings and shared disassembly.",
      "phase": "active",
      "url": "https://github.com/isa198x/isa198x",
      "capabilities": [],
      "verified_count": 0
    },
    {
      "id": "format",
      "name": "Format198x",
      "role": "Read and write native disk and media formats.",
      "phase": "active",
      "url": "https://github.com/format198x/format198x",
      "capabilities": [],
      "verified_count": 0
    },
    {
      "id": "debug",
      "name": "Debug198x",
      "role": "Exchange debug information between development tools.",
      "phase": "active",
      "url": "https://github.com/debug198x/debug198x",
      "capabilities": [],
      "verified_count": 0
    },
    {
      "id": "cat",
      "name": "Cat198x",
      "role": "Catalogue and verify binary assets.",
      "phase": "active",
      "url": "https://github.com/cat198x/cat198x",
      "capabilities": [],
      "verified_count": 0
    },
    {
      "id": "play",
      "name": "Play198x",
      "role": "Explore retro images and tracker music.",
      "phase": "active",
      "url": "https://github.com/play198x/play198x",
      "capabilities": [],
      "verified_count": 0
    },
    {
      "id": "forge",
      "name": "Forge198x",
      "role": "A planned development workbench for the family tools.",
      "phase": "deferred",
      "url": "https://github.com/forge198x/forge198x",
      "capabilities": [],
      "verified_count": 0
    }
  ],
  "capabilities": [
    {
      "id": "spectrum",
      "title": "Bitmap addressing",
      "configuration": "ZX Spectrum 48K PAL; DI, uncontended RAM, snapshot entry",
      "state": "verified",
      "state_label": "Execution verified",
      "checks": "49152 pixel coordinates and all declared next-row inputs; dynamic timing probes.",
      "metrics": {
        "pixel coordinates": 49152,
        "next-row pixel inputs": 48896,
        "timing paths": 3,
        "rejected mutations": 2
      },
      "observations": {
        "timing_paths": [
          {
            "row": 0,
            "pixel_address_t_states": 117,
            "next_row_t_states": 26
          },
          {
            "row": 7,
            "pixel_address_t_states": 117,
            "next_row_t_states": 65
          },
          {
            "row": 63,
            "pixel_address_t_states": 117,
            "next_row_t_states": 46
          }
        ]
      },
      "reference": "Emu198x execution against exhaustive output/timing assertions.",
      "remaining": "Other memory contention, ROM/tape loading, variants and original hardware.",
      "issues": [],
      "projects": [
        "code",
        "asm",
        "emu"
      ],
      "recorded_at": "2026-10-15T12:14:38Z",
      "age_days": 4,
      "host": "Linux-6.17.0-1022-azure-x86_64-with-glibc2.39",
      "python": "3.14.8",
      "samples_revision": "163e74e18e9536fb555ef7319fa08bbc1836542b",
      "sources": [
        {
          "url": "https://github.com/code198x/code-samples/blob/163e74e18e9536fb555ef7319fa08bbc1836542b/sinclair-zx-spectrum/patterns/assembly/rendering/bitmap-addressing/caller.asm",
          "sha256": "c3cdf6e56e889892abdbd26f66dfd8cb5db34be441f6c6c49b073a0fe51299f4",
          "matches_current_source": true,
          "current_sha256": "c3cdf6e56e889892abdbd26f66dfd8cb5db34be441f6c6c49b073a0fe51299f4"
        },
        {
          "url": "https://github.com/code198x/code-samples/blob/163e74e18e9536fb555ef7319fa08bbc1836542b/sinclair-zx-spectrum/patterns/assembly/rendering/bitmap-addressing/bitmap-addressing.inc",
          "sha256": "929a109ca24ffea6b0e79d0827e35b7c61bb2fcb0053b0551c96e6575e91ea02",
          "matches_current_source": true,
          "current_sha256": "929a109ca24ffea6b0e79d0827e35b7c61bb2fcb0053b0551c96e6575e91ea02"
        },
        {
          "url": "https://github.com/code198x/code-samples/blob/163e74e18e9536fb555ef7319fa08bbc1836542b/sinclair-zx-spectrum/patterns/assembly/rendering/bitmap-addressing/verification/verify.py",
          "sha256": "c1d37cfc4bd5db850814581a0f9d92c975834a3d0b7f405740c46c8d2d222eb0",
          "matches_current_source": true,
          "current_sha256": "c1d37cfc4bd5db850814581a0f9d92c975834a3d0b7f405740c46c8d2d222eb0"
        }
      ],
      "tools": [
        {
          "name": "asm198x",
          "version": "asm198x-v0.0.65",
          "archive_sha256": "02cd6c868f100a37d46fe6283927b13583594e620f966c0865f3f0a705f2d20e",
          "binary_sha256": "a197ded3948455fc990d5e2c888d5011a1ee1f5c4293618841966a5c9fdfdcf6"
        },
        {
          "name": "emu198x-spectrum",
          "version": "v0.34.0",
          "archive_sha256": "dd7d757a61532203eb9e22e2237fa7b436a9dd284c2d019896937ba59671b468",
          "binary_sha256": "6c51b9dd18b17b529994738a9c177da4f759b514f1d74e60f4ccc28959aa4889"
        }
      ],
      "firmware": [],
      "run_url": "https://github.com/code198x/code-samples/actions/runs/38733134735/job/116415609245",
      "recipe_url": "https://github.com/code198x/code-samples/tree/163e74e18e9536fb555ef7319fa08bbc1836542b/sinclair-zx-spectrum/patterns/assembly/rendering/bitmap-addressing",
      "records": [
        {
          "kind": "result",
          "sha256": "73962f586f9ec0a3f5a31013c5e3dfaba9e3648fc2c974ac68308c51f36eb9dd"
        },
        {
          "kind": "hosted-job",
          "sha256": "b867cbfa102a55ad28f2b461ae897832c241d68ad03bc44c4a5fd7e471c4b5ee"
        },
        {
          "kind": "tool-inputs",
          "sha256": "0b2895cd189ca85d3254a07cba3949f61843d917c29303a553a37e544b30d96f"
        }
      ],
      "reference_image": null,
      "reference_tools": [],
      "independent_validation": []
    },
    {
      "id": "c64",
      "title": "Hardware sprites",
      "configuration": "C64 PAL and NTSC; one single-colour hardware sprite",
      "state": "verified",
      "state_label": "Execution verified",
      "checks": "Twenty engine/model/case captures, independent ACME/VICE comparisons and a missing-X-bit mutation.",
      "metrics": {
        "independent engine/model captures": 20,
        "rejected X-bit mutations": 1
      },
      "observations": {
        "captures": [
          {
            "x": 160,
            "seed": 0,
            "engine": "emu",
            "model": "pal",
            "lit_pixels": 144,
            "prg_sha256": "0ef2d38adb9978fd456d0735da71211a62d8c870d3f928f9f1b23b2c2c8b3293",
            "image_sha256": "013ef650601b2e83a3cca6d0211211e217499df4feacfcab7f44014803cf5baf"
          },
          {
            "x": 160,
            "seed": 0,
            "engine": "vice",
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