[Kamirus]

Agents following this skill write a mops.toml that fails on every new Caffeine project. All new projects now use the moc 2 build template, which this skill didn't know about:

• It required --default-persistent-actors and --generate-view-queries. moc 2.0 removed both, so every compile fails with unknown option.
• It required skipIfMissing = true on check-stable. mops deprecated that in 2.13.2, and caffeine preview rejects it, so a project built from scratch couldn't be uploaded.
• It required --actor-idl=src/backend/system-idl and a system-idl/ directory, which the template replaced with the ic mops package in August.
• Its starting main.mo used the data-viewer mixin, which the template removed in July.

This syncs skills/caffeine-app/ from its source of truth, caffeinelabs/caffeine-cli at main (cd0968a), which fixed it in caffeinelabs/caffeine-cli#175. The skill now mirrors the template's minimal-backend variant rendered for moc 2: moc 2.0.0, lintoko 0.12.0, the Expose mixin from caffeineai-oql, the enhanced-migration chain seeded with a no-op 00000000.mo, and an empty-actor .old/src/backend/dist/backend.most baseline.

Checked locally because the PR workflow is waiting for maintainer approval on this fork: skill-validator 1.5.1 (the CI-pinned version) reports no errors and the same warnings as main, scripts/check-project.js passes, and npm run build builds all 36 pages. A scratch project built from the skill's mops.toml, migration, and worked backend example, with no system-idl/ directory, passes mops check (type check, stable check, and lint) and mops build on moc 2.0.0 with mops 3.4.2.

Before / After

mops.toml in the skill, abridged:

# Before
[canisters.backend.check-stable]
path = ".old/src/backend/dist/backend.most"
skipIfMissing = true

[toolchain]
moc = "1.8.1"

[moc]
args = ["--default-persistent-actors", "--actor-idl=src/backend/system-idl", "--generate-view-queries", ...]

[dependencies]
core = "2.5.0"
caffeineai-data-viewer = "0.1.0"

# After
[canisters.backend.check-stable]
path = ".old/src/backend/dist/backend.most"

[toolchain]
moc = "2.0.0"

[moc]
args = ["--implicit-package=core", "-no-check-ir", "-E=M0254", "-W=M0235,M0223,M0236,M0237", "-A=M0241"]

[dependencies]
core = "2.6.1"
ic = "4.2.0"
caffeineai-lints = "0.1.0"
caffeineai-oql = "0.8.0"

[canisters.backend.migrations]
chain = "src/backend/migrations"
check-limit = 1

What is unchanged

• Companion-skill references keep the icskills name writing-motoko. The source repo still says motoko, which skills.internetcomputer.org redirects; a change in caffeinelabs/caffeine-cli is switching it to writing-motoko, so future syncs need no rename.
• The sync also brings over two CLI notes the source gained since the last sync: CAFFEINE_VERBOSE=1, and custom domains in caffeine projects show.
• Two eval cases change with the guidance: the mops.toml case now expects moc 2 without the removed flags, and the missing-baseline case expects the seeded empty actor instead of skipIfMissing.

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