AI coding assistants can implement an architecture decision quickly. They can also reverse it just as quickly if the next session lacks the rationale and constraints. Architecture decision records (ADRs) turn those hidden assumptions into durable engineering context.
Write decisions at the moment of commitment
An ADR should include the problem, available alternatives, chosen option, trade-offs, evidence, date, and status. Record the decision when it is made—not weeks later after the implementation has obscured the original reasoning.
A short record is enough. The essential property is that future contributors can distinguish a final choice from exploratory discussion.
Connect decisions to implementation
Link each ADR to the relevant modules, tests, migration, or service boundary. If a decision concerns database writes, identify which path must be used and which paths are prohibited.
This connection helps a coding agent retrieve the decision when it encounters a related task. A purely chronological decision log is difficult to apply without topical metadata.
Make supersession a first-class operation
Real architectures evolve. Do not erase the old ADR when a new decision replaces it. Record the successor and explain what changed, including any compatibility work still pending.
Phasoric's Strata decision model and trusted knowledge lifecycle provide one architectural approach to maintaining the relationship between current decisions and historical evidence. This is distinct from simply appending every conversation to a long-term memory store.
Use an agent handoff checklist
Before handing a ticket to a coding assistant, attach the relevant ADRs, current API contracts, test commands, and deployment constraints. Ask the assistant to restate the governing decisions and identify potential conflicts before editing.
After the work, update the record only if the decision itself changed. Avoid polluting the canonical decision log with transient debug notes.
Test the workflow with a conflicting request
Ask a second agent to implement something that would violate an existing decision. A good workflow should retrieve the governing ADR and either adapt the implementation or surface the conflict for human review.
If the agent overlooks the ADR, improve retrieval cues and task briefs. Repetition in prompts is not an adequate substitute for accessible, authoritative project knowledge.
Next steps
Explore Phasoric to connect durable technical decisions with the knowledge your coding agents retrieve.