MCP, MCP server
witness
Quietly captures your Claude Code sessions and distills how your thinking, habits, and knowledge change over time — a dated growth archive with provenance, served over MCP.
Compatibility: Not stated.
Grade B
Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
Rescanned at commit 6fe528d62e2b, unchanged since the check below.
NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV PERMISSION_SHELL_DECLARED SECRETS_ENV_READ
Why this grade
- NETWORK_NO_FIXED_HOST Low
Makes a network call whose host is not written as a fixed address.
scripts/fetch-model.sh, line 3
# Run once after clone (or let install.sh call it). No Python - curl against the HF CDN. - SECRETS_PATH_DOTENV Low
Mentions a .env file.
.gitignore, line 19
.env - PERMISSION_SHELL_DECLARED Note
Runs shell commands, and the manifest or description says so.
cmd/commands/cli.go, line 154
cmd := exec.Command(exe, args...) - SECRETS_ENV_READ Note
Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.
npm/opencode/bin/model.js, line 86
const tokenizer = String(process.env.WITNESS_TOKENIZER_SHA256 || "").trim().toLowerCase()
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Note
requests shell access. The manifest names this permission.
PERMISSION_SHELL_DECLARED
cmd/commands/cli.go, line 154
cmd := exec.Command(exe, args...)
cmd/commands/install.go, line 696
// This is not hypothetical caution. The call used to be a bare exec.Command(...).Run() with
cmd/commands/install.go, line 725
cmd := exec.CommandContext(ctx, "claude", args...)
Show more
cmd/commands/nosubprocess_test.go, line 42
// invoked `claude mcp remove witness` via a bare exec.Command(...).Run() - no deadline, no
cmd/commands/nosubprocess_test.go, line 79
// exec.CommandContext(ctx, "sleep", "60") and asserted that returned - which tests the Go
cmd/commands/nosubprocess_test.go, line 80
// standard library, not witness: reverting claudeCLICommand to a bare exec.Command (the exact
cmd/commands/nosubprocess_test.go, line 122
// site bypasses it with a bare exec.Command("claude", ...).
cmd/commands/nosubprocess_test.go, line 140
if strings.Contains(line, `exec.Command("claude"`) {
Install and update
Pass
No install-time script found, and dependencies are pinned or absent.
Network
Concern
can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST
scripts/fetch-model.sh, line 3
# Run once after clone (or let install.sh call it). No Python - curl against the HF CDN.
scripts/fetch-model.sh, line 30
fetch() {
scripts/fetch-model.sh, line 41
curl -fL --retry 3 "${BASE}/${path}" -o "$tmp"
Secrets
Concern
reads a credential or environment file.
SECRETS_ENV_READ SECRETS_PATH_DOTENV
npm/opencode/witness.test.js, line 178
importEnvs.push(options?.env)
npm/opencode/bin/model.js, line 86
const tokenizer = String(process.env.WITNESS_TOKENIZER_SHA256 || "").trim().toLowerCase()
.gitignore, line 19
.env
Show more
npm/opencode/bin/model.test.js, line 61
process.env.WITNESS_TOKENIZER_SHA256 = sha256("tokenizer-bytes")
npm/opencode/bin/model.test.js, line 63
process.env.WITNESS_TOKENIZER_MIN_BYTES = "1"
npm/opencode/bin/model.test.js, line 71
assert.equal(marker.tokenizer.sha256, process.env.WITNESS_TOKENIZER_SHA256)
npm/opencode/bin/model.test.js, line 93
process.env.WITNESS_TOKENIZER_SHA256 = sha256("tokenizer-bytes")
npm/opencode/bin/model.test.js, line 95
process.env.WITNESS_TOKENIZER_MIN_BYTES = "1"
npm/opencode/bin/model.test.js, line 109
process.env.WITNESS_TOKENIZER_MIN_BYTES = "1"
npm/opencode/bin/model.test.js, line 119
process.env.WITNESS_TOKENIZER_MIN_BYTES = "1"
.gitignore, line 18
# Secrets / env
.gitignore, line 21
!.env.example
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Pass
No encoded or minified payload found.
Licence
Pass
A licence file is present (LICENSE).
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit 6fe528d62e2b. requests shell access. The manifest names this permission. can reach a host that is not written as a fixed address. reads a credential or environment file.
Date and source
Date checked:
github.com
Commit graded: 6fe528d62e2bdfaa274bbf8385918f4e9f9fe52b
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