Files

glm-5.1 c9c32a6aa6 decompose reconciler roadmap into 20 implementation tasks across 5 phases

Tasks follow the architecture spec phases:
- Phase 0: key field on UElement (2 tasks + review)
- Phase 1: reactive-host bridge / fiber tree (4 tasks + review)
- Phase 2: key-based children reconciliation (3 tasks + review)
- Phase 3: unmount & dispose support (4 tasks)
- Phase 4: TypeBox value optimizations (4 tasks)

Validated with taskgraph CLI: no cycles, 15 parallel generations,
3 high-risk tasks identified (signal-driven-updates, commit-mutations,
fiber-disposal).

2026-05-18 16:26:52 +00:00

1.7 KiB

Raw Blame History

id, name, status, depends_on, created, modified, scope, risk, impact, level

name

status

depends_on

created

modified

scope

risk

impact

level

value-clone-prevprops

Value.Clone for prevProps snapshots

pending

value-equal-bailout

2026-05-18T16:22:57.354731873Z

2026-05-18T16:22:57.354732316Z

narrow

low

component

implementation

Description

Use Value.Clone to create proper prevProps snapshots before mutation. Currently the architecture spec says fiber.prevProps should hold the snapshot before reconciliation, but without deep cloning, prevProps and fiber.props could share nested references.

Value.Clone provides a deep clone that the commitUpdate contract relies on: host.commitUpdate(instance, payload, tag, prevProps, nextProps, ctx) needs both the before and after state to be independent.

This is the second optimization in the strategy (after Value.Equal), and it's about correctness, not just performance. Without Value.Clone, hosts that read prevProps during commitUpdate might see already-mutated values.

Acceptance Criteria

Value.Clone imported from @alkdev/typebox/value
fiber.prevProps set to Value.Clone(fiber.props) before reconciliation updates props
prevProps is a deep clone — no shared references with fiber.props
commitUpdate receives independent prevProps and nextProps
Existing tests pass
New test: mutating fiber.props after setting prevProps does not affect prevProps
New test: commitUpdate receives correct before/after prop values

References

docs/architecture/reconciler.md — TypeBox Optimization Layer, Value.Clone row
docs/architecture/reconciler.md — Optimization Strategy (step 3)

Notes

To be filled by implementation agent

Summary

To be filled on completion

1.7 KiB Raw Blame History