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feat(coderd/database): add chat_context_resources table (#26430)

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Adds chat_context_resources: a per-chat pinned copy of the agent context
resources a chat is hydrated against. The agent-side table
(workspace_agent_context_resources) is last-writer-wins with no history,
so a chat copies its resources at hydration/refresh to keep a stable view
while the agent drifts.

Schema foundation only (no queries/dbauthz/prepareGeneration/SDK yet).
chat_id FK ON DELETE CASCADE for cleanup parity; no agent FK so the pin
survives agent replacement; PK (chat_id, source); reuses the 000522 enum
types.
This commit is contained in:
Kyle Carberry
2026-06-16 14:28:57 -07:00
committed by GitHub
parent 3e68dd304a
commit 53a6459ecd
10 changed files with 182 additions and 6 deletions
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coderd/database/models.go
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@@ -4809,6 +4809,29 @@ type Chat struct {
ContextError string `db:"context_error" json:"context_error"`
}
// Per-chat pinned copy of the agent context resources a chat is hydrated against. Copied from workspace_agent_context_resources at chat hydration and context refresh; survives agent replacement and workspace rebuilds.
type ChatContextResource struct {
ChatID uuid.UUID `db:"chat_id" json:"chat_id"`
// Resource locator: canonical file path for file-backed kinds, or the MCP server name for mcp_server resources.
Source string `db:"source" json:"source"`
// Discriminator for the body JSON shape. Matches the proto oneof variant: instruction_file, skill, mcp_config, mcp_server. PLUGIN/HOOK/SUBAGENT/COMMAND are reserved for the Claude Code plugin RFC.
BodyKind WorkspaceAgentContextBodyKind `db:"body_kind" json:"body_kind"`
// protojson-encoded variant body matching body_kind. Always populated; non-OK statuses use the variant zero value so the wire kind is still attributable.
Body json.RawMessage `db:"body" json:"body"`
// sha256 over the resource's original bytes (or transport-encoded server tool list).
ContentHash []byte `db:"content_hash" json:"content_hash"`
// Original payload size in bytes; populated regardless of status.
SizeBytes int64 `db:"size_bytes" json:"size_bytes"`
// Per-resource status. ok carries a populated body; oversize, unreadable, invalid, and excluded carry an empty body plus an error string.
Status WorkspaceAgentContextResourceStatus `db:"status" json:"status"`
// Per-resource error or warning string. Populated whenever status is non-ok; may also carry a non-fatal warning when status is ok.
Error string `db:"error" json:"error"`
// User-declared scan root that produced this resource. Empty for built-in scan roots.
SourcePath string `db:"source_path" json:"source_path"`
CreatedAt time.Time `db:"created_at" json:"created_at"`
UpdatedAt time.Time `db:"updated_at" json:"updated_at"`
}
type ChatDebugRun struct {
ID uuid.UUID `db:"id" json:"id"`
ChatID uuid.UUID `db:"chat_id" json:"chat_id"`