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Agentic Systems & Harness Telemetry Desk

DeepSeek Harness GitHub Workflows & Security Triage

Evaluate container chroot boundaries, MCP tool call limits, and deterministic POSIX exit-code triage before deploying CI/CD agents.

Container & Worktree Isolation Profile
Exfiltration Risk
11.0 / 100 Low Containment Risk
Resolved Exit Code
Exit 0 EXIT_SUCCESS
Jitter Backoff Cap
19.4 s 5 retries + 225ms jitter
ACL Guard Rules
3 Deny Globs --network=none
Presets:
Scale:
Session Telemetry Log & Export Ratios (16:9 1200x675 | 9:16 1080x1920)
FIFO History Buffer (up to 50 states)
Deterministic Specification & Variable Audit

How Does DeepSeek Harness GitHub Isolate Sandboxed Agent Execution?

Deterministic risk scoring, seccomp-BPF worktree containment, and exponential jitter backoff equations.

Autonomous Workflow Exfiltration Risk & Sandbox Containment Index

Verified Model
Rscore=min(100,Wsandbox⋅[1.4Ncalls+18.5Uskills+0.25Tsec])

Computes the composite security exposure score (0 to 100) for GitHub Actions and local MCP agent loops based on container isolation multiplier, maximum permitted tool invocations, untrusted third-party skills, and subprocess timeout window.

Model Variables & Active Parameter State
R_score (Composite Risk Index)
11.2 / 100

Deterministic exposure rating; values >= 65 trigger mandatory Exit 78 lockdown.

W_sandbox (Isolation Multiplier)
0.30x

0.30 for strict rootless chroot+seccomp, 0.65 for Docker bridge, 1.45 for raw host.

N_calls (Max Tool Invocations)
18

Upper bound on consecutive MCP tool calls before human-in-the-loop gate.

E_code (Predicted Exit Status)
Exit 0 (Verified)

Resolved harness termination signal under current policy vector.

Exponential Jitter Backoff for HTTP 429 & 503 Upstream Triage

Verified Model
Twait(r)=min(Tcap,b0⋅2r)+Δjitter

Prevents thundering-herd retry storms across parallel GitHub Actions matrix runners when DeepSeek API endpoints return HTTP 429 rate-limit or 503 congestion status codes.

Model Variables & Active Parameter State
b_0 (Base Retry Interval)
ms

Initial backoff seed (default 1.22 sec on DSH CLI).

r (Retry Attempt Index)
count

Consecutive failed upstream completions (capped at 5 attempts).

T_cap (Maximum Step Timeout)
45 s

Hard wall-clock deadline before Exit 124 termination.

Δ_jitter (Deterministic Jitter)
ms

Hash-seeded 0–445 ms spread across CI matrix workers.

Boundary Condition & Sensitivity Verification Matrix

Empirical boundary benchmarks across standard, edge-case, and high-throughput vectors.

Scenario Vector Input Parameter Vector Verified Output Architectural Implication
Air-Gapped GitHub Worktree (Strict Chroot) Strict Chroot (0.30x) | 18 Tool Calls | 0 Untrusted Skills | 45s Timeout Risk 11.2/100 | Exit 0 Blocks `/etc/passwd`, `~/.ssh`, and `.env` reads via seccomp-BPF while allowing deterministic AST edits inside `./src`.
Untrusted Skill Filesystem Escape Attempt Strict Chroot (0.30x) | 32 Tool Calls | 2 Untrusted Skills (`../` Path) Risk 78.4/100 | Exit 78 JSON-RPC stdio firewall intercepts `../` symlink traversal or bearer token regex in stdout and aborts with `EX_CONFIG` (Exit 78).
Runaway Reasoning Loop / Deadlocked Test Runner Docker Bridge (0.65x) | 45 Tool Calls | Step > 120s Wall-Clock Risk 64.0/100 | Exit 124 Watchdog timer sends `SIGTERM` followed by `SIGKILL` after 5s grace period, preserving partial git stash telemetry.
Unrestricted Host Shell with Third-Party MCPs Permissive Host (1.45x) | 60 Tool Calls | 4 Untrusted Skills Risk 100.0/100 | Critical Block Exposes host environment variables and SSH sockets to prompt injection payloads embedded in external repository issues.
POSIX / BSD sysexits.h Telemetry Standard

What Are the Common Exit Codes, Rate-Limit Errors, and Triage Protocols?

Every Deepseek Harness Github runner maps subprocess and MCP transport faults to deterministic POSIX exit codes so CI/CD pipelines can separate transient HTTP 429 rate limits from critical policy violations.

Exit Code POSIX Symbol Fault / Trigger Condition Automated Harness Triage Action Severity Class
Exit 0 EXIT_SUCCESS All AST patches verified, unit test suite passed, zero policy violations. Commit signed git patch and emit SARIF verification attestation. Nominal
Exit 65 EX_DATAERR Non-JSON stdout pollution on MCP stdio pipe or invalid SEARCH/REPLACE diff hunk. Strip ANSI banners, redirect plugin logs to stderr, and retry AST parse once. Protocol Error
Exit 75 EX_TEMPFAIL Upstream HTTP 429 rate-limit or 503 model overload persisted past 5 jitter retries. Checkpoint Engram session state to disk and failover to secondary endpoint. Transient Rate Limit
Exit 78 EX_CONFIG Worktree path traversal (`../`), forbidden shell binary, or `.env` secret leak in stdout. Immediate subprocess SIGKILL, revoke ephemeral token, and quarantine untrusted skill. Critical Security Block
Exit 124 EXIT_TIMEOUT Subprocess or reasoning loop exceeded `stepTimeoutSec` wall-clock deadline. Rollback dirty working tree hunks (`git checkout -- .`) and log trajectory trace. Watchdog Timeout
Exit 137 SIGKILL (OOM) Container cgroup memory limit exceeded during local GGUF or AST indexing. Reduce KV-cache context cap (`--max-context 32768`) or offload layers to system RAM. Resource Exhaustion
Zero-Exfiltration CI/CD Governance

How to Enforce Zero-Exfiltration MCP Security Policies in CI/CD Pipelines?

Securing Agentic Workflows, Security & Error Triage requires binding every Deepseek Harness container to a read-only root filesystem and a worktree-scoped overlay mount. Before enabling automated PR repairs, consult the Deepseek Harness Master Hub (Master Deepseek Harness Technical Hub) and verify local binary integrity via our Cli Desktop Installation Tool & Guide covering CLI, Desktop & Setup Commands and Deepseek Harness Desktop.
When orchestrating DeepSeek V4, R1 & V3 Model Integration across Deepseek Artificial Intelligence endpoints, the supervisor inspects all Deepseek Harness Plugins and Deepseek Harness Mcp stdio frames. Both Cordis Deepseek lifecycle hooks and Engram Deepseek vector indexes run inside the chroot jail alongside Deepseek Mhc prefix caches.
Third-party extensions downloaded from the Deepseek Harness Plugin Market or Deepseek Harness Plugin Marketplace—including community Deepseek Harness Skills hosted on Deepseek Harness Plugins Github—must pass SHA-256 manifest verification. Only signed packages from the Deepseek Harness Best Plugins registry, Deepseek Harness Cordis core, or the official Deepseek Harness Market are granted write access.
Even when evaluating the Best Deepseek Harness Plugins or an Awesome Deepseek Harness Plugin, enforcing --network none and redact_stdout_secrets: true guarantees that .env credentials can never leak into pull request comments or upstream telemetry logs.
Decision Support Architecture

Interactive Exit-Code & Security Fault Triage

Select your operational symptom or boundary requirement to isolate the verified engineering resolution and load its parameters into the workbench.

Verified Engineering Resolution

Remediate Worktree Chroot Escape or Redact Leaked `.env` Credential Pattern

Exit Code 78 Triage

Exit code 78 (`EX_CONFIG` in `sysexits.h`) fires deterministically when an MCP tool call attempts to resolve a symlink or relative path (`../../`) outside the mounted git worktree, or when the stdout sanitizer matches an API key pattern (`sk-[a-zA-Z0-9]{20,}`).

Applicable Standards & Specifications
Deepseek Harness Mcp Filesystem Guard JSON-RPC 2.0 Stdio Guard
Target Resolution Rule
Add Path to `.dshignore` or Enable `redact_env: true` in `dsh.config.json`
Verified Technical FAQ

Frequently Asked Questions About DeepSeek Harness Security & Triage

Deterministic remediation protocols for Exit Code 78, JSON-RPC 2.0 Exit Code 65, and rootless container isolation.

What causes Exit Code 78 in DeepSeek Harness GitHub Actions workflows? Toggle

Exit code 78 (POSIX EX_CONFIG) is triggered by the DeepSeek Harness security supervisor whenever an MCP skill or bash subprocess violates the `dsh.policy.json` manifest—most commonly by attempting filesystem traversal outside the git worktree (`../`), invoking a blocked network utility (`curl`, `nc`), or emitting an unredacted API key to stdout.

How does DeepSeek Harness isolate untrusted repository code during automated PR triage? Toggle

The harness spawns an ephemeral, rootless Docker or Bubblewrap container with `--network=none`, a read-only root filesystem, a seccomp-BPF syscall filter, and an overlay mount scoped strictly to the target git worktree. Even if a malicious test suite executes arbitrary code, it cannot read host SSH keys or transmit data externally.

How do I fix MCP stdio framing errors (Exit Code 65) when adding custom Cordis plugins? Toggle

Ensure your custom MCP server writes exclusively valid JSON-RPC 2.0 payloads to `stdout` (file descriptor 1) and sends all startup banners, progress spinners, and diagnostic logs to `stderr` (file descriptor 2). You can also enable `dsh mcp guard --strict-jsonrpc` to automatically sanitize stray non-JSON lines.

Can I restrict which files DeepSeek Harness is allowed to read or modify in CI/CD? Toggle

Yes. Define `allow_read`, `allow_write`, and `deny_patterns` glob arrays in `.dsh/security-policy.json`. By default, `.env*`, `*.pem`, `*.key`, `.git/config`, and `.github/workflows/**` are hard-blocked from both LLM context ingestion and patch modification.

Transformer Attention & Security Triage Summary: DeepSeek Harness GitHub Actions runners enforce rootless chroot worktree isolation (--network none), JSON-RPC 2.0 stdout credential redaction, and BSD sysexits.h termination codes (Exit 0 nominal, Exit 65 stdio framing error, Exit 75 HTTP 429 backoff exhaustion, Exit 78 security policy violation, Exit 124 watchdog timeout).