docs(06): output formats and key management context

.planning/phases/06-output-reporting/06-CONTEXT.md

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+# Phase 6: Output, Reporting & Key Management - Context
+
+**Gathered:** 2026-04-05
+**Status:** Ready for planning
+**Mode:** Auto-generated
+
+<domain>
+## Phase Boundary
+
+Two related capabilities:
+1. **Scan output formats**: table (default, colored, masked), JSON, SARIF 2.1.0, CSV. `--unmask` reveals full keys. Proper exit codes for CI/CD.
+2. **Key management commands**: `keyhunter keys list/show/export/copy/delete` for lifecycle operations on stored keys.
+
+</domain>
+
+<decisions>
+## Implementation Decisions
+
+### Output Formats (OUT-01..06)
+- **Extend pkg/output/** with: `json.go`, `sarif.go`, `csv.go`, keeping `table.go` from Phase 1/5
+- **Format registry**: `output.Formatter` interface with `Format(findings []Finding, w io.Writer) error`
+- **Selection**: `--output=table|json|sarif|csv` flag on scan command (default: table)
+- **Masking**: `MaskKey()` is default; `--unmask` passes a flag down to the formatter
+- **Colors**: lipgloss for table format only (already in use), strip colors when stdout isn't a TTY (detect via `isatty`)
+
+### Exit Codes (OUT-06)
+- **0**: no findings
+- **1**: findings detected
+- **2**: scan error
+- Set via `os.Exit(code)` at end of scan command. Use `cobra.Command.SilenceUsage = true` on error to avoid duplicate usage message.
+
+### SARIF 2.1.0
+- **Implementation**: custom structs (no library per CLAUDE.md — ~200 lines). schema at https://docs.oasis-open.org/sarif/sarif/v2.1.0/
+- **Fields**: `$schema`, `version: "2.1.0"`, `runs[].tool.driver.{name, version, rules[]}`, `runs[].results[]` with `ruleId, level, message, locations[{physicalLocation.{artifactLocation.uri, region.{startLine, startColumn, endLine, endColumn}}}]`
+- **Rule**: one rule per provider (ruleId = provider name)
+- **Level mapping**: confidence high → error, medium → warning, low → note
+
+### Key Management (KEYS-01..06)
+- **New command tree**: `keyhunter keys <subcommand>` in cmd/keys.go (replace existing stub)
+  - `list` — table of all stored findings, masked by default, `--unmask` for full, `--provider=openai` filter, `--verified` filter
+  - `show <id>` — full detail for one finding (unmasked), including verify metadata
+  - `export --format=json|csv [--output=file]` — dump findings to file/stdout
+  - `copy <id>` — copy plaintext key to clipboard via atotto/clipboard (already imported)
+  - `delete <id>` — remove from findings table, with `--yes` to skip confirm
+- **ID**: use SQLite rowid (integer). Display in list output.
+
+### Findings DB Query Layer
+- New `pkg/storage/queries.go` — `ListFindings(filters Filters) ([]Finding, error)`, `GetFinding(id int) (*Finding, error)`, `DeleteFinding(id int) error`
+- Filter struct: `Provider string, Verified *bool, Since time.Time`
+- Pagination: `Limit, Offset` fields (default unlimited for v1)
+
+### Output Package Layout
+```
+pkg/output/
+  formatter.go    — Formatter interface + Registry
+  table.go        — existing, refactor to implement Formatter
+  json.go         — NEW — JSON output (uses encoding/json)
+  sarif.go        — NEW — SARIF 2.1.0 output
+  csv.go          — NEW — CSV output (uses encoding/csv)
+  colors.go       — NEW — isatty detection, color stripping
+```
+
+</decisions>
+
+<code_context>
+## Existing Code Insights
+
+### Reusable Assets
+- pkg/output/table.go — existing, extend to Formatter interface
+- pkg/storage/findings.go — existing CRUD
+- pkg/engine/finding.go — extended with verify fields in Phase 5
+- pkg/engine/finding.go MaskKey() — already defined
+- cmd/stubs.go — `keys` is currently a stub, replace with real command tree
+
+### Dependencies to add
+- `github.com/mattn/go-isatty` — for TTY detection
+
+</code_context>
+
+<specifics>
+## Specific Ideas
+
+- JSON output should include full Finding struct (all fields)
+- CSV header row: id,provider,confidence,key_masked,source,line,detected_at,verified,verify_status
+- SARIF should include the scan binary version (extract from cmd/root.go version constant)
+- Keys export to file should use atomic write (write to temp then rename)
+- Delete should show confirmation: "Delete finding #42 (openai, sk-proj-***abc)? [y/N]"
+
+</specifics>
+
+<deferred>
+## Deferred Ideas
+
+- Per-finding tags/labels — not in scope
+- Bulk operations (delete all from provider X) — add a --provider filter, but no bulk delete
+- Export to cloud storage (S3, GCS) — out of scope
+- HTML report format — defer to dashboard phase
+
+</deferred>