docs(matrix): add namespace-semantics row (LAB-646) - #62
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Feature matrix had no row for namespace semantics despite per-SDK divergence: py emits a distinct ns: segment, ts/rs emit a bare namespace-colon-key/hash with no ns: token, and unprefixed keys of any origin scope to the SaaS default namespace as an open, ungated write space. Descriptive only, every cell cites file:line on each repo's main branch.
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WalkthroughThe documentation adds a cross-SDK comparison of namespace key formats, defaults, empty values, validation, server-side isolation, and ChangesNamespace semantics
Priority: ⬇️ Low Estimated code review effort: 1 (Trivial) | ~2 minutes Change: Other Merge Risk: 🟡 Moderate · up to The protocol documents disagree about whether interop keys work against the deployed backend. Resolve the deployment contract before merging so SDK users are not directed toward an unsupported integration. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In `@sdk-feature-matrix.md`:
- Line 69: Update the Rust and TypeScript isolation entries in the SDK feature
matrix to state that ordinary keys resolve to default and remain subject to
allowed_namespaces authorization, while server-recognised ns: and nsapi:
prefixes resolve to named namespaces and are also validated. Remove the
“ungated” claim and align the wording with the auto-mode behavior described on
line 68.
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CodeRabbit flagged the Rust/TS "server-side isolation" cells as factually inconsistent with the Server column: both said the same allowed_namespaces check applies to whatever namespace a key resolves to, default included, so calling Rust/TS traffic "ungated" contradicted the very next cell. Reworded: Rust/TS keys resolve to default and are checked by the same ACL, they just cannot be scoped to anything narrower than default. Clarified the open-write-space note to mean the writer-class boundary (ck_sdk_/ck_api_), not an absence of authorization.
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coderabbitai's re-review on the prior fix caught the deeper issue:
saying rust/ts traffic "can never be scoped to anything other than
default" is still wrong. Neither SDK validates the namespace
value's charset, and namespace is spliced directly ahead of the key
with one colon, so a namespace value that itself starts ns:/nsapi:
(coderabbitai's own example: .namespace("ns:tenant")) produces a key
the SaaS genuinely parses as that literal named namespace. Reworded
the Charset validation and Server-side isolation cells, and the
trailing note, to state the real behavior: default is the outcome
for ordinary namespace values, not a hard confinement.
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Inline comments:
In `@sdk-feature-matrix.md`:
- Line 72: Align the deployment-status qualification between
sdk-feature-matrix.md and spec/interop-mode.md: verify the deployed validator
behavior, then update both documents so interop routing, default namespace
handling, allowed_namespaces, and keyClass: 'open' consistently reflect whether
saas#91 is deployed. Keep the documented current behavior and pending-status
distinction synchronized without changing the LAB-640 scope.
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Summary
Test plan
Summary by CodeRabbit
defaultnamespace and remain in an open write space.Summary
This PR refines the "Server-side isolation" documentation in the SDK feature matrix to clarify how namespace authorization actually works for unprefixed keys.
Changes
Corrected the Rust and TypeScript SDK isolation descriptions:
defaultare subject to the sameallowed_namespacesgrant check as any other key — the actual limitation is that these SDKs can never scope traffic to anything narrower thandefault, since they never emit a namespace prefix.Clarified the explanatory note on unprefixed keys:
keyClass: 'open') — the space is open to bothck_sdk_andck_api_callers.allowed_namespacesgrant applies todefault.default, which onlyns:/nsapi:-prefixed keys can do.Purpose
The changes fix a potentially misleading impression that unprefixed keys bypass authorization entirely. The documentation now correctly separates the concept of writer-class access ("open") from namespace-level authorization, ensuring readers understand that authorization still applies while the actual limitation is a lack of per-namespace segmentation.
Note: These are documentation-only changes to
sdk-feature-matrix.md; no functional code was modified.Summary
This PR updates the SDK feature matrix documentation to clarify namespace semantics, specifically documenting an unintended behavior where namespace values that themselves begin with
ns:/nsapi:prefixes can escape thedefaultnamespace boundary.Changes
The documentation updates in
sdk-feature-matrix.mdexpand three sections:Charset validation on the namespace value: Adds detail that because Rust and TypeScript SDKs splice the namespace value directly ahead of the key with a single colon (without charset validation in auto mode), a namespace value like
.namespace("ns:tenant")produces a key that the SaaS parses as a literal named namespace. Notes that interop mode validation closes this gap for interop keys only, and clarifies that the server-side parser re-splits the key from scratch with no knowledge of which SDK produced it.Server-side isolation: Refines the description to distinguish between two cases — namespace values with no embedded
ns:/nsapi:colon resolve todefault, while unvalidated values that begin withns:/nsapi:land in that literal named namespace instead, since the SaaS re-parses the finished key without knowledge of SDK-side intent.NOTE callout: Updates the qualifier for which keys resolve to
default(only those whose namespace value doesn't itself start withns:/nsapi:) and adds explanation that this represents an unintended escape fromdefaultrather than a supported opt-in mechanism, deferring the decision on whether to validate/reject such values to LAB-640.Purpose
These are documentation-only changes that clarify an existing gap in client-side namespace validation, making the matrix accurately reflect current behavior without recommending any specific remediation.