Builds on merged PR-1..5. Adds the bridge that lets legacy
commit_memory / recall_memory tools route through the v2 plugin path
when MEMORY_PLUGIN_URL is wired, otherwise fall through to the
existing DB-backed code unchanged.
What ships:
* handlers/mcp_tools_memory_legacy_shim.go — translation helpers:
scopeToWritableNamespace, scopeToReadableNamespaces,
commitMemoryLegacyShim, recallMemoryLegacyShim,
namespaceKindToLegacyScope
* handlers/mcp_tools.go — toolCommitMemory + toolRecallMemory now
delegate to the shim when memv2 is wired
Translation:
commit: LOCAL → workspace:<self>
TEAM → team:<root> (resolver picks at runtime)
empty → defaults to LOCAL (preserves legacy default)
GLOBAL → still rejected at MCP bridge (C3 preserved)
recall: LOCAL → search restricted to workspace:<self>
TEAM → workspace:<self> + team:<root>
empty → all readable (matches v2 default behavior)
GLOBAL → blocked at MCP bridge (C3 preserved)
Response shapes are preserved exactly:
commit: {"id":"...","scope":"LOCAL"|"TEAM"} — agents see no diff
recall: [{"id":"...","content":"...","scope":"LOCAL"|...,"created_at":"..."}, ...]
org-namespace memories get the same [MEMORY id=... scope=ORG ns=...]
prefix as v2 search; legacy scope label comes back as "GLOBAL"
Operational rollout:
* Today: MEMORY_PLUGIN_URL unset on most operators → legacy DB path
* After PR-7 backfill: operators set MEMORY_PLUGIN_URL → all writes
flow through plugin transparently
* After PR-8 cutover: dual-write removed, plugin is the only path
* After PR-9 (~60 days later): legacy tool entries dropped entirely
Coverage: 100% on every helper, 100% on recallMemoryLegacyShim,
94.7% on commitMemoryLegacyShim. The 1 uncovered line is a defensive
guard against a v2-response-parse error that's unreachable when the
v2 tool is operating correctly (it always returns valid JSON).
Edge cases pinned:
* scope translation for every legacy value + invalid scope
* resolver error propagation
* plugin error propagation
* GLOBAL still blocked
* default-scope fallback (LOCAL)
* empty content rejected
* No-op when v2 unwired (legacy SQL path exercised via sqlmock)
* org-namespace memory wrap on recall + GLOBAL scope label round-trip
* No-results returns "No memories found." (legacy message preserved)
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