Move trusted-server integrations across host, path, authentication, schema, and quota generations with contract evidence instead of string replacement.
Repository lineage identifies the Mappls REST candidate, but only the account entitlement matrix can confirm each operation, host, authentication generation, region, and quota.
Legacy sources are fully covered. Candidate links expose the closest public evidence and its maturity; they do not silently upgrade it to an entitlement or support declaration.
mapmyindia-api-addendumsmapmyindia-rest-apimappls-rest-apisResolve each dimension explicitly. “It compiled” does not prove identity, lifecycle, failure, privacy, or operational compatibility.
Legacy source material can contain OAuth-era or historical key patterns.
Current normalized core REST evidence uses a restricted static key query contract; some account lines can remain OAuth-based.
Resolve generation per operation and run the bounded non-production conformance harness.
Historical hosts, paths, parameters, and response envelopes appear across repositories.
Use the exact operation-local server and schema in the normalized OpenAPI catalog.
Record OpenAPI fingerprint plus response contract tests for the entitled account.
Applications often couple directly to provider status and payload shapes.
Normalize invalid, unauthorized, quota, retryable, transport, and provider failures at the adapter.
Replay the same failure corpus against both adapters and retain classifications.
Do not advance on calendar alone. Each stage creates evidence that makes the next one safe and reversible.
Inventory every REST operation, package, host, credential class, callback, and owner before changing production.
Resolve the exact entitled package or endpoint with Mappls and verify its supported toolchain, region, quotas, authentication, and lifecycle.
Move REST operation calls behind a narrow application-owned interface without changing product behavior.
Replay approved fixtures and shadow eligible reads while preventing duplicate writes or user-visible side effects.
Release to internal users and bounded cohorts with health gates, ownership, automatic stop conditions, and immutable version evidence.
Remove legacy credentials and dependencies only after rollback and audit retention obligations expire.
These examples deliberately model the seam and verification pattern—not unconfirmed package symbols. Implement the adapters only after the exact target contract is issued.
type SearchResult = { id: string; label: string; latitude: number; longitude: number };
type SearchContext = { query: string; region?: string; requestId: string };
interface SearchProvider {
readonly generation: "legacy" | "candidate";
search(input: SearchContext, signal: AbortSignal): Promise<SearchResult[]>;
}
export async function compareRead(
legacy: SearchProvider,
candidate: SearchProvider,
input: SearchContext,
) {
const timeout = AbortSignal.timeout(2_500);
const [before, after] = await Promise.all([
legacy.search(input, timeout),
candidate.search(input, timeout),
]);
return {
requestId: input.requestId,
legacyCount: before.length,
candidateCount: after.length,
sameFirstId: before[0]?.id === after[0]?.id,
// Retain only approved comparison fields—never credentials or raw addresses.
};
}The candidate and exact package/endpoint versions are approved by the owning Mappls product team for the target account and region.
Journey-level contract tests pass on every supported device, browser, architecture, and release build—not only a debug simulator.
Security, privacy, accessibility, performance, quota, observability, and support owners accept measured differences.
A bounded cohort completes the agreed observation window without an unresolved severity-one or severity-two regression.
Stopping traffic is not enough. Recover durable resources, sessions, events, and in-flight commands without duplicates or hidden divergence.
Prepare support packetKeep the previous signed artifact, dependency lock, configuration, and credential valid until the observation window closes.
Make the provider selection server- or release-controlled; define automatic stop signals and one accountable rollback owner.
For durable state, prove backward-readable records or a reversible data migration before allowing candidate writes.
After rollback, reconcile in-flight requests and resources by stable identifiers instead of replaying commands blindly.