Modder chasm (chasmlol) used Codex and Claude, guided by an AGENT.md instruction file, to build a Skate 3 physics/trick-graph/bone-retargeting mashup into 2009's Call of Duty: Modern Warfare 2 in roughly a week. The sprint ran atop IW4L — a from-scratch Rust rewrite of the MW2 engine published by vladtrc two weeks earlier — which itself rests on years of community reverse-engineering (IW4x, OpenAssetTools). The claim is that AI compressed the build sprint from years to days; the durable long pole remains the community RE foundation. Multiple other creators now report comparable AI-driven engine mashups and reverse-engineering feats (Minecraft→Elden Ring, retro-game translation repeated 5×, Half-Life 2/Minecraft fork extended with Claude Code, IW4L ported to iPhone, Road Rash×DiRT physics in 3 days, PS2 games decompiled to browser), but primary artifacts (repos, writeups, verified integration-vs-overlay breakdowns) for the core mashup mechanism remain unpublished.
Independent builders (MarcoSela's read-fix-build-sideload IW4L→iPhone port, Xabi4488's Claude Code fork/extend of HalfCraft, titkun's Opus 5.5 Road Rash×DiRT physics, Opus 5.5 PS2→browser decompilation) are arriving at Scott's agentic-coding positions with dated receipts: markdown-native instruction files (AGENT.md), verification loops (human as test oracle), code-first architecture (progressive tool discovery, signal extraction), and the specification-as-asset gap (mashup demos remain artifactless — exactly the delete-test/characterisation-testing mismatch his frameworks predict). The replication wave corroborates semantic decompilation's core claim (agent-assisted RE capability claims vs verified artifacts) while the overlay-vs-integration confound is a live evidence-bearing mismatch ticket.
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queries asked of Scott's wikis
- coding-agents AGENT.md instruction-file patterns for reverse-engineering workflows
- agent-assisted-reverse-engineering capability claims vs. verified artifacts
- local-inference original-hardware retro-game translation replication
- open-weights model sovereignty for game-engine decompilation
- coding-agents read-fix-build-sideload loops for engine porting
- agent-memory maintaining RE specifications across build sprints
2026-10-11T16:22:12Z
grounded: converges/high — Independent builders (MarcoSela's read-fix-build-sideload IW4L→iPhone port, Xabi4488's Claude Code fork/extend of HalfCraft, titkun's Opus 5.5 Road Rash×DiRT ph
2026-10-11T16:07:17Z
Destructoid article adds independent press corroboration that AI-driven game-engine reverse engineering has become replicable beyond chasm; velocity spike on Opus 5.5 PS2 decompilation post (96th percentile, magnitude-valve eligible) shows the replication wave still drawing top-decile cross-platform attention. Core unknowns unchanged: no primary artifact from chasm (repo/writeup/breakdown), integration-vs-overlay unresolved, universal-modder unverified. Case remains in waiting posture for primary artifacts while thin implementations continue arriving every 1–2 days.
2026-10-11T15:42:37Z
evidence attached: reddit.post.1x38qz0 — Destructoid article reporting multiple major games ported to browser via AI reverse-engineering provides independent corroboration that AI-driven game-engine reverse engineering is becoming a replicable capability beyond the original chasm demo.
2026-10-11T02:46:29Z
Velocity spike on the Opus 5.5 PS2 decompilation post (14.7× baseline, 87.5th percentile peer rank) and magnitude-valve eligibility show the replication wave still drawing top-decile cross-platform attention, but the new HN link is a duplicate of the 500B-token FPS decompilation story and no primary artifact has appeared for chasm's mashup mechanism, integration-vs-overlay, or universal-modder. The case remains in its waiting posture: replication proven at translation/decompilation layer across ≥6 creators; engine-internals mashup replication still open and artifactless.
2026-10-11T02:33:19Z
evidence attached: hn.story.50039092 — shared external link with case evidence
2026-10-11T01:03:55Z
New independent replication (Opus 5.5 decompiling PS2 games to browser ports) widens the AI-driven reverse-engineering pattern at the translation/decompilation layer, but the case's core unknowns — chasm's mechanism, integration-vs-overlay, universal-modder — remain artifactless. Measured heat (3.3 pts/h, steady, 299h age) confirms the attention wave has settled; magnitude-valve eligibility reflects the crest, not current velocity. Case stays in waiting posture for primary artifacts.
2026-10-11T00:36:53Z
evidence attached: reddit.post.1x2tq6s — Independent corroboration of AI-driven game reverse engineering capability — Opus 5.5 decompiling PS2 games to browser ports extends the chasm engine-mashup evidence.
2026-10-10T20:13:09Z
New independent account (500B-token FPS decompilation on HN) widens the replication pattern for AI-driven reverse engineering, but the case's core unknowns — chasm's mechanism, integration-vs-overlay, universal-modder — remain artifactless. Measured heat (0.5 pts/h, steady, 294h age) confirms the attention wave has settled; the velocity spike on the titkun post is engagement drift on existing evidence, not a new breakthrough. Case stays in waiting posture for primary artifacts.
2026-10-10T18:47:50Z
evidence attached: hn.story.50034816 — Independent account of AI agents decompiling a first-person shooter (500B tokens), reinforcing the replicable AI-driven reverse-engineering capability claim.
2026-10-10T00:31:04Z
New independent replication: 25-year AAA/indie dev (titkun) built Road Rash×DiRT mashup physics/vehicles in ~3 days with Opus 5.5 — third independent builder (after MarcoSela IW4L→iPhone, Xabi4488 HalfCraft fork) with no stated tie to chasm's lineage, supporting the broader AI-driven game-engine capability claim at the physics layer. Core mashup/RE mechanism and integration-vs-overlay remain artifactless; case stays in waiting posture for primary artifacts.
2026-10-09T19:58:38Z
evidence attached: reddit.post.1x1mb45 — 25-year game dev builds Road Rash×DiRT mashup physics/vehicles in 3 days with Opus 5.5 — replicates the AI-driven game-engine capability claim.
2026-10-08T11:46:54Z
Measured heat confirms the wave has fully settled: current velocity ~0.3 pts/h (0.2% of peak), comments ~0.2/h, momentum steady at ~238h age. The magnitude-valve eligibility reflects the two-day-old cross-platform crest, not present signal. No new material evidence since the MarcoSela port — only single-digit engagement drift and one shared HN link. The case remains in a waiting posture for primary artifacts (chasm writeup, HalfCraft repo, universal-modder verification, independent RE mashup), which is the correct holding pattern.
2026-10-08T10:42:27Z
evidence attached: hn.story.50003819 — shared external link with case evidence
2026-10-06T15:17:07Z
grounded: converges/high — Independent builders keep arriving at Scott's own positions with dated receipts: MarcoSela's multi-week read-fix-build-sideload port (human as direct-and-test o
2026-10-06T15:06:18Z
The MarcoSela IW4L→iPhone port adds the first non-lineage third-party data point on agents doing multi-week game-engine engineering — but it ports open-source code with the human as test oracle, so it strengthens the capability premise without advancing the unverified core (artifact-backed RE mashup replication outside chasm's framework, integration-vs-overlay). The velocity spike again resolved to single-digit upvote drift on aging posts, so heat stays low despite magnitude-valve eligibility: the valve reads the two-day-old crest, while current rate is ~2% of peak and the newest object sits at 6 points — a waiting posture on primary artifacts, not a live wave.
2026-10-06T13:34:27Z
evidence attached: reddit.post.1wz1416 — Second independent builder using Claude for a multi-week game-engine engineering feat (full Rust MW2 engine ported to iPhone via a read-fix-build-sideload loop), bearing on whether AI-driven game-engine work is replicable beyond one demo.
2026-10-06T04:38:51Z
First in-genre replication data, but in fork-and-extend form: whiskydumb built HalfCraft (Minecraft inside Half-Life 2) on chasmlol's SkyCraft lineage, and a third modder forked it and used Claude Code to fix and extend it (ultrawide, 80→750fps, 'Claude wrote the code; my part was testing'). Within-lineage adaptation and maintenance with agents is now claimed — but it is still artifactless (2-point post, no verified repo), so the decisive unknowns survive unchanged: from-scratch replication outside chasm's framework, and integration-vs-overlay. Holds at corroborated; heat low in the dead wave, but thin implementations keep landing every 1–2 days, so the case stays open rather than cooling further.
2026-10-06T03:33:52Z
evidence attached: reddit.post.1wyrkla — Independent corroboration: a second modder forked and extended chasmlol's SkyCraft-lineage engine mashup with Claude Code (ultrawide fix, 80→750fps), exactly the replication the case hinges on.
2026-10-05T10:48:33Z
relevance=high case never alerted; deterministic escalation to deliver
2026-10-04T18:32:18Z
The case's first artifact-backed replication data arrived — but at the simple end of the RE spectrum: Opus 5.5 retro-game translation, repeated 5× by an ordinary user on original hardware, with agent-workflow detail (plan.md task division, Haiku handoff). Replicability is now demonstrated for translation-scale AI-driven game RE while the mashup core stays artifactless, so the open question sharpens from 'does it replicate at all?' to 'does replication extend up the difficulty curve to engine internals?'. That material movement plus a rate re-lift (1.3→~10 pts/h, still top-decile for age) earns medium heat despite cooling momentum — it prices the fresh evidence on Scott's own backends, not a second wave.
2026-10-04T18:25:58Z
evidence attached: reddit.post.1wxlome — Five-times-repeated ~4-hour AI-driven retro-game translation on original hardware is exactly the replicability evidence the game-reverse-engineering case asks for.
2026-10-04T13:28:42Z
The wave's attention pulse has crested: momentum flipped accelerating→cooling, current rate ~1.3 pts/h is ~1/35 of peak, and the HN crossover of chasm's second mashup failed to catch (2 pts, 0 comments), so the genre settles from 'hot expanding wave' into a corroborated-but-mechanism-unverified phenomenon awaiting primary artifacts. The only fresh signal is an unverified self-described-no-experience commenter describing an agentic Sonnet/Opus-with-orchestrator modding pipeline — a hint of bottom-up replication attempts, too thin to move the overlay-vs-integration fork.
2026-10-04T13:25:59Z
evidence attached: hn.story.49953095 — Second AI-driven engine mashup by the same modder (chasmlol) — Minecraft inside Skyrim over shared memory — showing the capability is sustained rather than a one-off demo.
2026-10-03T19:03:33Z
The genre keeps replicating on the surface — a fourth claimed instance (FighterZ→LoL-style MOBA) — while its depth came under specific attack: a commenter deconstructs the mashups as transparent overlays reading terrain/enemy state and signaling into the original game rather than true engine integration, sharpening the standing confound into a concrete architectural claim. Meanwhile attention, after five days of steady decline, re-accelerated via the wave-discussion thread; periphery still expanding, so medium holds.
2026-10-03T18:25:45Z
evidence attached: reddit.post.1wwt0nh — Another claimed AI-driven reverse-engineering engine mashup (FighterZ into a LoL-style MOBA) directly bears on the case's replicability test.
2026-10-03T11:30:17Z
Replication test is tipping from 'one-off demo' to 'forming genre': alongside Jacobs' verified Minecraft→Elden Ring build and chasm's echoed MW2/Skate claim, the fresh thread surfaces a third instance (Minecraft→GTA) and a claimed universal-modding repo — independent implementations across creators and communities justify corroborated. The live question shifts to depth: how much of these builds is genuine agentic RE versus integration sprints riding pre-existing community decompilations.
2026-10-03T09:25:36Z
evidence attached: reddit.post.1wwip6n — Second-community claim of agentic-AI engine mashups/physics transfers (Mirror's Edge into Skyrim) — weak and possibly pre-AI prior art, but it bears directly on the replication test in the mashup case.
2026-10-03T06:53:29Z
origin walked (opencode/cheap-glm, conf 0.72): anchor reddit.post.1wwfhal -> echo.x.aa265a474c by Tobyn Jacobs (@TobynJacobs)
2026-10-03T06:40:11Z
grounded: converges/high — Chasm's claimed workflow — months of RE/spec groundwork as the durable long pole, then agents collapsing the build sprint to a week against the running game as
2026-10-03T06:31:38Z
case created — A bounded, checkable capability claim (years of engine RE compressed to a week, enabling a novel mashup genre) within the radar's AI-assisted-RE interest, currently anchored only on a secondhand echo awaiting chasm's own artifact.