Implementation plan · school-core

1 · Summary

[Three sentences: the change, the boundary, the outcome. This is the whole plan for a busy reader.]

2 · Accepted decisions

Decisions already made — recorded so they do not silently re-open during implementation.

Accepted · ADR/decision [id] [The decision, the reason it was made, and the governing doc if any.]

Accepted · ADR/decision [id] [Second decision placeholder — separate the "what" from the "why outward".]

3 · Open questions

Deliberately kept out of section 2: these are NOT yet decisions and the plan does not pretend otherwise.

Open [Question, options considered, and who/what unblocks it. One open question per block.]

Open [Second open question — owning it is also a commitment: the plan names the decision-owner.]

4 · Milestones

#	Milestone	Exit criteria	Verification
M1	[first vertical slice]	[definition of done]	[how CI/human checks it]
M2	[midpoint milestone]	[definition of done]	[how CI/human checks it]
M3	[shipping milestone]	[definition of done]	[how CI/human checks it]

5 · Mockups

In production, drop Tier-1 wireframe/prototype renders here (inlined, never hot-linked). At template time these are explicit placeholders.

[ Mockup 1 — main state ]

[ Mockup 2 — boundary / empty / error state ]

6 · Risk table

Risk	Likelihood	Impact	Mitigation / trigger to escalate
[concrete risk, not a generic worry]	med	high	[mitigation or the signal that should escalate it]
[second concrete risk]	low	med	[mitigation or the signal that should escalate it]

7 · Data-flow diagrams

Text-shape diagrams at template time; replace each placeholder with a Tier-2 `html-diagram` render or an inline diagram for the real plan.

/* data-flow diagram placeholder */
[component] --> [store/API] --> [view]
            \--> [side effect / event] --> [observer]

/* second data-flow diagram placeholder (failure path) */
[input] --> [validator] --X bad --> [user-facing error]
                \-- ok --> [write path]

8 · Canonical source

The markdown source of record for this implementation plan lives at docs/plans/...[slug]-spec.md (see the <meta name="source"> header of this file). Edit the .md; regenerate this render. Any edit to this page without a matching change to the source is drift.