feat(core): GSAP keyframe parsing, mutations, and API routes [1/6]

[miguel-heygen]

Summary

Parse native GSAP keyframes in 3 formats (percentage, object-array, simple-array). 5 mutation functions (add/remove/update keyframe, convert-to-keyframes, remove-all). Expand SUPPORTED_PROPS to 21. Studio API routes for all mutation types. 92 test cases.

Part 1 of 6 — core parser foundation. No UI changes.

Test plan

• bun run --cwd packages/core test — all parser tests pass
• Keyframe parsing: percentage, object-array, simple-array formats
• Mutations: add, remove, update, convert, remove-all

[github-actions]

Fallow audit report

Found 46 findings.

Duplication (33)

Severity	Rule	Location	Description
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.stress.test.ts:296	Code clone group 1 (10 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.stress.test.ts:313	Code clone group 2 (13 lines, 5 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.stress.test.ts:499	Code clone group 2 (13 lines, 5 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:281	Code clone group 1 (10 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:296	Code clone group 2 (13 lines, 5 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:312	Code clone group 2 (13 lines, 5 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:346	Code clone group 2 (13 lines, 5 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1096	Code clone group 3 (14 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1139	Code clone group 3 (14 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1197	Code clone group 4 (16 lines, 3 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1209	Code clone group 5 (10 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1210	Code clone group 6 (6 lines, 3 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1216	Code clone group 7 (6 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1224	Code clone group 4 (16 lines, 3 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1239	Code clone group 5 (10 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1240	Code clone group 6 (6 lines, 3 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1248	Code clone group 7 (6 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1257	Code clone group 4 (16 lines, 3 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1271	Code clone group 6 (6 lines, 3 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1451	Code clone group 8 (8 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.test.ts:1470	Code clone group 8 (8 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.ts:562	Code clone group 9 (7 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.ts:660	Code clone group 9 (7 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.ts:919	Code clone group 10 (8 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.ts:1170	Code clone group 11 (15 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.ts:1251	Code clone group 11 (15 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/parsers/gsapParser.ts:1314	Code clone group 10 (8 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/studio-api/routes/files.ts:398	Code clone group 12 (5 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/studio-api/routes/files.ts:654	Code clone group 13 (5 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/studio-api/routes/files.ts:662	Code clone group 14 (5 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/studio-api/routes/files.ts:694	Code clone group 13 (5 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/studio-api/routes/files.ts:702	Code clone group 14 (5 lines, 2 instances)
minor	fallow/code-duplication	packages/core/src/studio-api/routes/render.ts:48	Code clone group 12 (5 lines, 2 instances)

Health (13)

Severity	Rule	Location	Description
critical	fallow/high-crap-score	packages/core/src/parsers/gsapParser.ts:71	'resolveNode' has CRAP score 315.9 (threshold: 30.0, cyclomatic 36)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapParser.ts:145	'selectorFromQueryCall' has CRAP score 49.5 (threshold: 30.0, cyclomatic 13)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapParser.ts:223	'visitCallExpression' has CRAP score 43.1 (threshold: 30.0, cyclomatic 12)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapParser.ts:282	'resolveTargetSelector' has CRAP score 43.1 (threshold: 30.0, cyclomatic 12)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapParser.ts:311	'objectExpressionToRecord' has CRAP score 43.1 (threshold: 30.0, cyclomatic 12)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapParser.ts:402	'visitCallExpression' has CRAP score 31.6 (threshold: 30.0, cyclomatic 10)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapParser.ts:959	'buildTweenStatementCode' has CRAP score 31.6 (threshold: 30.0, cyclomatic 10)
major	fallow/high-crap-score	packages/core/src/parsers/gsapParser.ts:1285	'resolveConversionProps' has CRAP score 43.1 (threshold: 30.0, cyclomatic 12)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapSerialize.ts:66	'lines' has CRAP score 43.1 (threshold: 30.0, cyclomatic 12)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapSerialize.ts:222	'<arrow>' has CRAP score 37.1 (threshold: 30.0, cyclomatic 11)
minor	fallow/high-crap-score	packages/core/src/parsers/gsapSerialize.ts:274	'<arrow>' has CRAP score 43.1 (threshold: 30.0, cyclomatic 12)
critical	fallow/high-crap-score	packages/core/src/studio-api/routes/files.ts:434	'<arrow>' has CRAP score 160.0 (threshold: 30.0, cyclomatic 25)
critical	fallow/high-crap-score	packages/core/src/studio-api/routes/files.ts:605	'<arrow>' has CRAP score 238.6 (threshold: 30.0, cyclomatic 31)

Generated by fallow.

[miguel-heygen]

• feat(studio): design panel, timeline polish, feature flag [6/6] #1172
• feat(studio): keyframe hooks wiring — session, cache, toolbar [5/6] #1171
• feat(studio): keyframe diamonds, navigation, context menu [4/6] #1170
• feat(studio): GSAP runtime bridge + optimistic updates [3/6] #1169
• feat(core): spring physics solver + runtime fixes [2/6] #1168
• feat(core): GSAP keyframe parsing, mutations, and API routes [1/6] #1167 👈 (View in Graphite)
• main

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